FAILURE MAP
← Case archive

FA-76696 / Email MIME structure / Open access

Classify recipients of a delivery status report: status class · case 01

Temporary failures are treated as permanent bounces and unsubscribe the recipient.

Verified by executionVariant 1 · 7 checks per implementationDownload source bundle ↓JSON ↗

ROOT CAUSE

The status class decision evaluates `'hard'` where the contract requires `'hard' if klass == '5' else ('soft' if klass == '4' else 'unknown')`.

VERIFIED REPAIR

Use `'hard' if klass == '5' else ('soft' if klass == '4' else 'unknown')` for the status class decision and keep every other rule of the model unchanged.

Unsuccessful approach: Treating contradictory 2.x.x failures as hard still unsubscribes on unreliable evidence. The attempted `'soft' if klass == '4' else 'hard'` still disagrees with a fixture.

Case contract

A report is valid only when its type is multipart/report, its report-type parameter (name and value case-insensitive) is delivery-status, and its second part is message/delivery-status or message/global-delivery-status. Each recipient {final, action, status} gets: failed -> hard for status class 5, soft for 4, unknown otherwise; delayed -> delayed; delivered, relayed or expanded -> ok; anything else unknown (actions are case-insensitive and trimmed). has_original is true when a third part is message/rfc822 or text/rfc822-headers. Invalid reports give {valid False, recipients [], has_original False}.

Why this case matters

Bounce processing drives list hygiene and retry decisions; misclassification unsubscribes healthy addresses.

1 / The failure

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(report):
    t = report['type'].lower()
    params = {k.lower(): v for k, v in report.get('params', {}).items()}
    rt = params.get('report-type', '').lower()
    parts = report.get('parts', [])
    if t != 'multipart/report' or rt != 'delivery-status' or len(parts) < 2 or parts[1]['type'].lower() not in ('message/delivery-status', 'message/global-delivery-status'):
        return {'valid': False, 'recipients': [], 'has_original': False}
    rows = []
    for r in parts[1]['recipients']:
        action = r['action'].strip().lower()
        klass = r['status'].strip()[:1]
        if action == 'failed':
            verdict = 'hard'
        elif action == 'delayed':
            verdict = 'delayed'
        elif action in ('delivered', 'relayed', 'expanded'):
            verdict = 'ok'
        else:
            verdict = 'unknown'
        rows.append([r['final'].strip(), verdict])
    orig = len(parts) > 2 and parts[2]['type'].lower() in ('message/rfc822', 'text/rfc822-headers')
    return {'valid': True, 'recipients': rows, 'has_original': orig}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
_CASES = {1: [('capitalised parameter name', ({'type': 'multipart/report', 'params': {'Report-Type': 'Delivery-Status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'a1@x', 'action': 'failed', 'status': '5.1.1'}]}, {'type': 'message/rfc822'}]},), {'has_original': True, 'recipients': [['a1@x', 'hard']], 'valid': True}), ('internationalised status part', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global-delivery-status', 'recipients': [{'final': 'b@x', 'action': 'delayed', 'status': '4.4.1'}]}]},), {'has_original': False, 'recipients': [['b@x', 'delayed']], 'valid': True}), ('global message is not a status', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False}), ('status class decides', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'c@x', 'action': 'failed', 'status': '4.2.2'}, {'final': 'd1@x', 'action': 'failed', 'status': '2.0.0'}]}]},), {'has_original': False, 'recipients': [['c@x', 'soft'], ['d1@x', 'unknown']], 'valid': True}), ('padded capitalised action', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': ' e@x ', 'action': ' Failed ', 'status': ' 5.7.1'}]}, {'type': 'text/rfc822-headers'}]},), {'has_original': True, 'recipients': [['e@x', 'hard']], 'valid': True}), ('relayed and expanded', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'f@x', 'action': 'relayed', 'status': '2.0.0'}, {'final': 'g@x', 'action': 'expanded', 'status': '2.0.1'}]}]},), {'has_original': False, 'recipients': [['f@x', 'ok'], ['g@x', 'ok']], 'valid': True}), ('not a report', ({'type': 'multipart/mixed', 'params': {}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False})], 2: [('capitalised parameter name', ({'type': 'multipart/report', 'params': {'Report-Type': 'Delivery-Status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'a2@x', 'action': 'failed', 'status': '5.1.1'}]}, {'type': 'message/rfc822'}]},), {'has_original': True, 'recipients': [['a2@x', 'hard']], 'valid': True}), ('internationalised status part', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global-delivery-status', 'recipients': [{'final': 'b@x', 'action': 'delayed', 'status': '4.4.2'}]}]},), {'has_original': False, 'recipients': [['b@x', 'delayed']], 'valid': True}), ('global message is not a status', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False}), ('status class decides', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'c@x', 'action': 'failed', 'status': '4.2.2'}, {'final': 'd2@x', 'action': 'failed', 'status': '2.0.0'}]}]},), {'has_original': False, 'recipients': [['c@x', 'soft'], ['d2@x', 'unknown']], 'valid': True}), ('padded capitalised action', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': ' e@x ', 'action': ' Failed ', 'status': ' 5.7.2'}]}, {'type': 'text/rfc822-headers'}]},), {'has_original': True, 'recipients': [['e@x', 'hard']], 'valid': True}), ('relayed and expanded', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'f@x', 'action': 'relayed', 'status': '2.0.0'}, {'final': 'g@x', 'action': 'expanded', 'status': '2.0.2'}]}]},), {'has_original': False, 'recipients': [['f@x', 'ok'], ['g@x', 'ok']], 'valid': True}), ('not a report', ({'type': 'multipart/mixed', 'params': {}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False})], 3: [('capitalised parameter name', ({'type': 'multipart/report', 'params': {'Report-Type': 'Delivery-Status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'a3@x', 'action': 'failed', 'status': '5.1.1'}]}, {'type': 'message/rfc822'}]},), {'has_original': True, 'recipients': [['a3@x', 'hard']], 'valid': True}), ('internationalised status part', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global-delivery-status', 'recipients': [{'final': 'b@x', 'action': 'delayed', 'status': '4.4.3'}]}]},), {'has_original': False, 'recipients': [['b@x', 'delayed']], 'valid': True}), ('global message is not a status', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False}), ('status class decides', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'c@x', 'action': 'failed', 'status': '4.2.2'}, {'final': 'd3@x', 'action': 'failed', 'status': '2.0.0'}]}]},), {'has_original': False, 'recipients': [['c@x', 'soft'], ['d3@x', 'unknown']], 'valid': True}), ('padded capitalised action', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': ' e@x ', 'action': ' Failed ', 'status': ' 5.7.3'}]}, {'type': 'text/rfc822-headers'}]},), {'has_original': True, 'recipients': [['e@x', 'hard']], 'valid': True}), ('relayed and expanded', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'f@x', 'action': 'relayed', 'status': '2.0.0'}, {'final': 'g@x', 'action': 'expanded', 'status': '2.0.3'}]}]},), {'has_original': False, 'recipients': [['f@x', 'ok'], ['g@x', 'ok']], 'valid': True}), ('not a report', ({'type': 'multipart/mixed', 'params': {}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False})], 4: [('capitalised parameter name', ({'type': 'multipart/report', 'params': {'Report-Type': 'Delivery-Status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'a4@x', 'action': 'failed', 'status': '5.1.1'}]}, {'type': 'message/rfc822'}]},), {'has_original': True, 'recipients': [['a4@x', 'hard']], 'valid': True}), ('internationalised status part', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global-delivery-status', 'recipients': [{'final': 'b@x', 'action': 'delayed', 'status': '4.4.4'}]}]},), {'has_original': False, 'recipients': [['b@x', 'delayed']], 'valid': True}), ('global message is not a status', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False}), ('status class decides', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'c@x', 'action': 'failed', 'status': '4.2.2'}, {'final': 'd4@x', 'action': 'failed', 'status': '2.0.0'}]}]},), {'has_original': False, 'recipients': [['c@x', 'soft'], ['d4@x', 'unknown']], 'valid': True}), ('padded capitalised action', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': ' e@x ', 'action': ' Failed ', 'status': ' 5.7.4'}]}, {'type': 'text/rfc822-headers'}]},), {'has_original': True, 'recipients': [['e@x', 'hard']], 'valid': True}), ('relayed and expanded', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'f@x', 'action': 'relayed', 'status': '2.0.0'}, {'final': 'g@x', 'action': 'expanded', 'status': '2.0.4'}]}]},), {'has_original': False, 'recipients': [['f@x', 'ok'], ['g@x', 'ok']], 'valid': True}), ('not a report', ({'type': 'multipart/mixed', 'params': {}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False})], 5: [('capitalised parameter name', ({'type': 'multipart/report', 'params': {'Report-Type': 'Delivery-Status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'a5@x', 'action': 'failed', 'status': '5.1.1'}]}, {'type': 'message/rfc822'}]},), {'has_original': True, 'recipients': [['a5@x', 'hard']], 'valid': True}), ('internationalised status part', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global-delivery-status', 'recipients': [{'final': 'b@x', 'action': 'delayed', 'status': '4.4.5'}]}]},), {'has_original': False, 'recipients': [['b@x', 'delayed']], 'valid': True}), ('global message is not a status', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False}), ('status class decides', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'c@x', 'action': 'failed', 'status': '4.2.2'}, {'final': 'd5@x', 'action': 'failed', 'status': '2.0.0'}]}]},), {'has_original': False, 'recipients': [['c@x', 'soft'], ['d5@x', 'unknown']], 'valid': True}), ('padded capitalised action', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': ' e@x ', 'action': ' Failed ', 'status': ' 5.7.5'}]}, {'type': 'text/rfc822-headers'}]},), {'has_original': True, 'recipients': [['e@x', 'hard']], 'valid': True}), ('relayed and expanded', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'f@x', 'action': 'relayed', 'status': '2.0.0'}, {'final': 'g@x', 'action': 'expanded', 'status': '2.0.5'}]}]},), {'has_original': False, 'recipients': [['f@x', 'ok'], ['g@x', 'ok']], 'valid': True}), ('not a report', ({'type': 'multipart/mixed', 'params': {}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False})]}
for _label, _args, _expected in _CASES[N]:
    check(_label, solve(*_args), _expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
capitalised parameter name{'has_original': True, 'recipients': [['a1@x', 'hard']], 'valid': True}{'has_original': True, 'recipients': [['a1@x', 'hard']], 'valid': True}Passed
internationalised status part{'has_original': False, 'recipients': [['b@x', 'delayed']], 'valid': True}{'has_original': False, 'recipients': [['b@x', 'delayed']], 'valid': True}Passed
global message is not a status{'has_original': False, 'recipients': [], 'valid': False}{'has_original': False, 'recipients': [], 'valid': False}Passed
status class decides{'has_original': False, 'recipients': [['c@x', 'hard'], ['d1@x', 'hard']], 'valid': True}{'has_original': False, 'recipients': [['c@x', 'soft'], ['d1@x', 'unknown']], 'valid': True}Failed
padded capitalised action{'has_original': True, 'recipients': [['e@x', 'hard']], 'valid': True}{'has_original': True, 'recipients': [['e@x', 'hard']], 'valid': True}Passed
relayed and expanded{'has_original': False, 'recipients': [['f@x', 'ok'], ['g@x', 'ok']], 'valid': True}{'has_original': False, 'recipients': [['f@x', 'ok'], ['g@x', 'ok']], 'valid': True}Passed
not a report{'has_original': False, 'recipients': [], 'valid': False}{'has_original': False, 'recipients': [], 'valid': False}Passed

SHA-256 / 7170441eff19f6de900791036f438ae084f3a28bf9053316a8a315b4768a5ca4

2 / The unsuccessful fix

Exit 1
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(report):
    t = report['type'].lower()
    params = {k.lower(): v for k, v in report.get('params', {}).items()}
    rt = params.get('report-type', '').lower()
    parts = report.get('parts', [])
    if t != 'multipart/report' or rt != 'delivery-status' or len(parts) < 2 or parts[1]['type'].lower() not in ('message/delivery-status', 'message/global-delivery-status'):
        return {'valid': False, 'recipients': [], 'has_original': False}
    rows = []
    for r in parts[1]['recipients']:
        action = r['action'].strip().lower()
        klass = r['status'].strip()[:1]
        if action == 'failed':
            verdict = 'soft' if klass == '4' else 'hard'
        elif action == 'delayed':
            verdict = 'delayed'
        elif action in ('delivered', 'relayed', 'expanded'):
            verdict = 'ok'
        else:
            verdict = 'unknown'
        rows.append([r['final'].strip(), verdict])
    orig = len(parts) > 2 and parts[2]['type'].lower() in ('message/rfc822', 'text/rfc822-headers')
    return {'valid': True, 'recipients': rows, 'has_original': orig}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
_CASES = {1: [('capitalised parameter name', ({'type': 'multipart/report', 'params': {'Report-Type': 'Delivery-Status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'a1@x', 'action': 'failed', 'status': '5.1.1'}]}, {'type': 'message/rfc822'}]},), {'has_original': True, 'recipients': [['a1@x', 'hard']], 'valid': True}), ('internationalised status part', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global-delivery-status', 'recipients': [{'final': 'b@x', 'action': 'delayed', 'status': '4.4.1'}]}]},), {'has_original': False, 'recipients': [['b@x', 'delayed']], 'valid': True}), ('global message is not a status', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False}), ('status class decides', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'c@x', 'action': 'failed', 'status': '4.2.2'}, {'final': 'd1@x', 'action': 'failed', 'status': '2.0.0'}]}]},), {'has_original': False, 'recipients': [['c@x', 'soft'], ['d1@x', 'unknown']], 'valid': True}), ('padded capitalised action', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': ' e@x ', 'action': ' Failed ', 'status': ' 5.7.1'}]}, {'type': 'text/rfc822-headers'}]},), {'has_original': True, 'recipients': [['e@x', 'hard']], 'valid': True}), ('relayed and expanded', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'f@x', 'action': 'relayed', 'status': '2.0.0'}, {'final': 'g@x', 'action': 'expanded', 'status': '2.0.1'}]}]},), {'has_original': False, 'recipients': [['f@x', 'ok'], ['g@x', 'ok']], 'valid': True}), ('not a report', ({'type': 'multipart/mixed', 'params': {}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False})], 2: [('capitalised parameter name', ({'type': 'multipart/report', 'params': {'Report-Type': 'Delivery-Status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'a2@x', 'action': 'failed', 'status': '5.1.1'}]}, {'type': 'message/rfc822'}]},), {'has_original': True, 'recipients': [['a2@x', 'hard']], 'valid': True}), ('internationalised status part', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global-delivery-status', 'recipients': [{'final': 'b@x', 'action': 'delayed', 'status': '4.4.2'}]}]},), {'has_original': False, 'recipients': [['b@x', 'delayed']], 'valid': True}), ('global message is not a status', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False}), ('status class decides', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'c@x', 'action': 'failed', 'status': '4.2.2'}, {'final': 'd2@x', 'action': 'failed', 'status': '2.0.0'}]}]},), {'has_original': False, 'recipients': [['c@x', 'soft'], ['d2@x', 'unknown']], 'valid': True}), ('padded capitalised action', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': ' e@x ', 'action': ' Failed ', 'status': ' 5.7.2'}]}, {'type': 'text/rfc822-headers'}]},), {'has_original': True, 'recipients': [['e@x', 'hard']], 'valid': True}), ('relayed and expanded', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'f@x', 'action': 'relayed', 'status': '2.0.0'}, {'final': 'g@x', 'action': 'expanded', 'status': '2.0.2'}]}]},), {'has_original': False, 'recipients': [['f@x', 'ok'], ['g@x', 'ok']], 'valid': True}), ('not a report', ({'type': 'multipart/mixed', 'params': {}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False})], 3: [('capitalised parameter name', ({'type': 'multipart/report', 'params': {'Report-Type': 'Delivery-Status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'a3@x', 'action': 'failed', 'status': '5.1.1'}]}, {'type': 'message/rfc822'}]},), {'has_original': True, 'recipients': [['a3@x', 'hard']], 'valid': True}), ('internationalised status part', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global-delivery-status', 'recipients': [{'final': 'b@x', 'action': 'delayed', 'status': '4.4.3'}]}]},), {'has_original': False, 'recipients': [['b@x', 'delayed']], 'valid': True}), ('global message is not a status', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False}), ('status class decides', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'c@x', 'action': 'failed', 'status': '4.2.2'}, {'final': 'd3@x', 'action': 'failed', 'status': '2.0.0'}]}]},), {'has_original': False, 'recipients': [['c@x', 'soft'], ['d3@x', 'unknown']], 'valid': True}), ('padded capitalised action', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': ' e@x ', 'action': ' Failed ', 'status': ' 5.7.3'}]}, {'type': 'text/rfc822-headers'}]},), {'has_original': True, 'recipients': [['e@x', 'hard']], 'valid': True}), ('relayed and expanded', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'f@x', 'action': 'relayed', 'status': '2.0.0'}, {'final': 'g@x', 'action': 'expanded', 'status': '2.0.3'}]}]},), {'has_original': False, 'recipients': [['f@x', 'ok'], ['g@x', 'ok']], 'valid': True}), ('not a report', ({'type': 'multipart/mixed', 'params': {}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False})], 4: [('capitalised parameter name', ({'type': 'multipart/report', 'params': {'Report-Type': 'Delivery-Status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'a4@x', 'action': 'failed', 'status': '5.1.1'}]}, {'type': 'message/rfc822'}]},), {'has_original': True, 'recipients': [['a4@x', 'hard']], 'valid': True}), ('internationalised status part', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global-delivery-status', 'recipients': [{'final': 'b@x', 'action': 'delayed', 'status': '4.4.4'}]}]},), {'has_original': False, 'recipients': [['b@x', 'delayed']], 'valid': True}), ('global message is not a status', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False}), ('status class decides', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'c@x', 'action': 'failed', 'status': '4.2.2'}, {'final': 'd4@x', 'action': 'failed', 'status': '2.0.0'}]}]},), {'has_original': False, 'recipients': [['c@x', 'soft'], ['d4@x', 'unknown']], 'valid': True}), ('padded capitalised action', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': ' e@x ', 'action': ' Failed ', 'status': ' 5.7.4'}]}, {'type': 'text/rfc822-headers'}]},), {'has_original': True, 'recipients': [['e@x', 'hard']], 'valid': True}), ('relayed and expanded', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'f@x', 'action': 'relayed', 'status': '2.0.0'}, {'final': 'g@x', 'action': 'expanded', 'status': '2.0.4'}]}]},), {'has_original': False, 'recipients': [['f@x', 'ok'], ['g@x', 'ok']], 'valid': True}), ('not a report', ({'type': 'multipart/mixed', 'params': {}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False})], 5: [('capitalised parameter name', ({'type': 'multipart/report', 'params': {'Report-Type': 'Delivery-Status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'a5@x', 'action': 'failed', 'status': '5.1.1'}]}, {'type': 'message/rfc822'}]},), {'has_original': True, 'recipients': [['a5@x', 'hard']], 'valid': True}), ('internationalised status part', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global-delivery-status', 'recipients': [{'final': 'b@x', 'action': 'delayed', 'status': '4.4.5'}]}]},), {'has_original': False, 'recipients': [['b@x', 'delayed']], 'valid': True}), ('global message is not a status', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False}), ('status class decides', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'c@x', 'action': 'failed', 'status': '4.2.2'}, {'final': 'd5@x', 'action': 'failed', 'status': '2.0.0'}]}]},), {'has_original': False, 'recipients': [['c@x', 'soft'], ['d5@x', 'unknown']], 'valid': True}), ('padded capitalised action', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': ' e@x ', 'action': ' Failed ', 'status': ' 5.7.5'}]}, {'type': 'text/rfc822-headers'}]},), {'has_original': True, 'recipients': [['e@x', 'hard']], 'valid': True}), ('relayed and expanded', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'f@x', 'action': 'relayed', 'status': '2.0.0'}, {'final': 'g@x', 'action': 'expanded', 'status': '2.0.5'}]}]},), {'has_original': False, 'recipients': [['f@x', 'ok'], ['g@x', 'ok']], 'valid': True}), ('not a report', ({'type': 'multipart/mixed', 'params': {}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False})]}
for _label, _args, _expected in _CASES[N]:
    check(_label, solve(*_args), _expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
capitalised parameter name{'has_original': True, 'recipients': [['a1@x', 'hard']], 'valid': True}{'has_original': True, 'recipients': [['a1@x', 'hard']], 'valid': True}Passed
internationalised status part{'has_original': False, 'recipients': [['b@x', 'delayed']], 'valid': True}{'has_original': False, 'recipients': [['b@x', 'delayed']], 'valid': True}Passed
global message is not a status{'has_original': False, 'recipients': [], 'valid': False}{'has_original': False, 'recipients': [], 'valid': False}Passed
status class decides{'has_original': False, 'recipients': [['c@x', 'soft'], ['d1@x', 'hard']], 'valid': True}{'has_original': False, 'recipients': [['c@x', 'soft'], ['d1@x', 'unknown']], 'valid': True}Failed
padded capitalised action{'has_original': True, 'recipients': [['e@x', 'hard']], 'valid': True}{'has_original': True, 'recipients': [['e@x', 'hard']], 'valid': True}Passed
relayed and expanded{'has_original': False, 'recipients': [['f@x', 'ok'], ['g@x', 'ok']], 'valid': True}{'has_original': False, 'recipients': [['f@x', 'ok'], ['g@x', 'ok']], 'valid': True}Passed
not a report{'has_original': False, 'recipients': [], 'valid': False}{'has_original': False, 'recipients': [], 'valid': False}Passed

SHA-256 / 5fbb9a0bb573591e5f575f3ea404f6072d0b1db89dc024783ece5bc1f87e981b

3 / The verified repair

Exit 0
"""Failure Map reference implementation. Python standard library only."""
import json

N = 1
observations = []
def solve(report):
    t = report['type'].lower()
    params = {k.lower(): v for k, v in report.get('params', {}).items()}
    rt = params.get('report-type', '').lower()
    parts = report.get('parts', [])
    if t != 'multipart/report' or rt != 'delivery-status' or len(parts) < 2 or parts[1]['type'].lower() not in ('message/delivery-status', 'message/global-delivery-status'):
        return {'valid': False, 'recipients': [], 'has_original': False}
    rows = []
    for r in parts[1]['recipients']:
        action = r['action'].strip().lower()
        klass = r['status'].strip()[:1]
        if action == 'failed':
            verdict = 'hard' if klass == '5' else ('soft' if klass == '4' else 'unknown')
        elif action == 'delayed':
            verdict = 'delayed'
        elif action in ('delivered', 'relayed', 'expanded'):
            verdict = 'ok'
        else:
            verdict = 'unknown'
        rows.append([r['final'].strip(), verdict])
    orig = len(parts) > 2 and parts[2]['type'].lower() in ('message/rfc822', 'text/rfc822-headers')
    return {'valid': True, 'recipients': rows, 'has_original': orig}
def check(label, actual, expected):
    observations.append({"check": label, "actual": actual, "expected": expected, "passed": actual == expected})
_CASES = {1: [('capitalised parameter name', ({'type': 'multipart/report', 'params': {'Report-Type': 'Delivery-Status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'a1@x', 'action': 'failed', 'status': '5.1.1'}]}, {'type': 'message/rfc822'}]},), {'has_original': True, 'recipients': [['a1@x', 'hard']], 'valid': True}), ('internationalised status part', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global-delivery-status', 'recipients': [{'final': 'b@x', 'action': 'delayed', 'status': '4.4.1'}]}]},), {'has_original': False, 'recipients': [['b@x', 'delayed']], 'valid': True}), ('global message is not a status', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False}), ('status class decides', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'c@x', 'action': 'failed', 'status': '4.2.2'}, {'final': 'd1@x', 'action': 'failed', 'status': '2.0.0'}]}]},), {'has_original': False, 'recipients': [['c@x', 'soft'], ['d1@x', 'unknown']], 'valid': True}), ('padded capitalised action', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': ' e@x ', 'action': ' Failed ', 'status': ' 5.7.1'}]}, {'type': 'text/rfc822-headers'}]},), {'has_original': True, 'recipients': [['e@x', 'hard']], 'valid': True}), ('relayed and expanded', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'f@x', 'action': 'relayed', 'status': '2.0.0'}, {'final': 'g@x', 'action': 'expanded', 'status': '2.0.1'}]}]},), {'has_original': False, 'recipients': [['f@x', 'ok'], ['g@x', 'ok']], 'valid': True}), ('not a report', ({'type': 'multipart/mixed', 'params': {}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False})], 2: [('capitalised parameter name', ({'type': 'multipart/report', 'params': {'Report-Type': 'Delivery-Status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'a2@x', 'action': 'failed', 'status': '5.1.1'}]}, {'type': 'message/rfc822'}]},), {'has_original': True, 'recipients': [['a2@x', 'hard']], 'valid': True}), ('internationalised status part', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global-delivery-status', 'recipients': [{'final': 'b@x', 'action': 'delayed', 'status': '4.4.2'}]}]},), {'has_original': False, 'recipients': [['b@x', 'delayed']], 'valid': True}), ('global message is not a status', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False}), ('status class decides', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'c@x', 'action': 'failed', 'status': '4.2.2'}, {'final': 'd2@x', 'action': 'failed', 'status': '2.0.0'}]}]},), {'has_original': False, 'recipients': [['c@x', 'soft'], ['d2@x', 'unknown']], 'valid': True}), ('padded capitalised action', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': ' e@x ', 'action': ' Failed ', 'status': ' 5.7.2'}]}, {'type': 'text/rfc822-headers'}]},), {'has_original': True, 'recipients': [['e@x', 'hard']], 'valid': True}), ('relayed and expanded', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'f@x', 'action': 'relayed', 'status': '2.0.0'}, {'final': 'g@x', 'action': 'expanded', 'status': '2.0.2'}]}]},), {'has_original': False, 'recipients': [['f@x', 'ok'], ['g@x', 'ok']], 'valid': True}), ('not a report', ({'type': 'multipart/mixed', 'params': {}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False})], 3: [('capitalised parameter name', ({'type': 'multipart/report', 'params': {'Report-Type': 'Delivery-Status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'a3@x', 'action': 'failed', 'status': '5.1.1'}]}, {'type': 'message/rfc822'}]},), {'has_original': True, 'recipients': [['a3@x', 'hard']], 'valid': True}), ('internationalised status part', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global-delivery-status', 'recipients': [{'final': 'b@x', 'action': 'delayed', 'status': '4.4.3'}]}]},), {'has_original': False, 'recipients': [['b@x', 'delayed']], 'valid': True}), ('global message is not a status', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False}), ('status class decides', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'c@x', 'action': 'failed', 'status': '4.2.2'}, {'final': 'd3@x', 'action': 'failed', 'status': '2.0.0'}]}]},), {'has_original': False, 'recipients': [['c@x', 'soft'], ['d3@x', 'unknown']], 'valid': True}), ('padded capitalised action', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': ' e@x ', 'action': ' Failed ', 'status': ' 5.7.3'}]}, {'type': 'text/rfc822-headers'}]},), {'has_original': True, 'recipients': [['e@x', 'hard']], 'valid': True}), ('relayed and expanded', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'f@x', 'action': 'relayed', 'status': '2.0.0'}, {'final': 'g@x', 'action': 'expanded', 'status': '2.0.3'}]}]},), {'has_original': False, 'recipients': [['f@x', 'ok'], ['g@x', 'ok']], 'valid': True}), ('not a report', ({'type': 'multipart/mixed', 'params': {}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False})], 4: [('capitalised parameter name', ({'type': 'multipart/report', 'params': {'Report-Type': 'Delivery-Status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'a4@x', 'action': 'failed', 'status': '5.1.1'}]}, {'type': 'message/rfc822'}]},), {'has_original': True, 'recipients': [['a4@x', 'hard']], 'valid': True}), ('internationalised status part', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global-delivery-status', 'recipients': [{'final': 'b@x', 'action': 'delayed', 'status': '4.4.4'}]}]},), {'has_original': False, 'recipients': [['b@x', 'delayed']], 'valid': True}), ('global message is not a status', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False}), ('status class decides', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'c@x', 'action': 'failed', 'status': '4.2.2'}, {'final': 'd4@x', 'action': 'failed', 'status': '2.0.0'}]}]},), {'has_original': False, 'recipients': [['c@x', 'soft'], ['d4@x', 'unknown']], 'valid': True}), ('padded capitalised action', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': ' e@x ', 'action': ' Failed ', 'status': ' 5.7.4'}]}, {'type': 'text/rfc822-headers'}]},), {'has_original': True, 'recipients': [['e@x', 'hard']], 'valid': True}), ('relayed and expanded', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'f@x', 'action': 'relayed', 'status': '2.0.0'}, {'final': 'g@x', 'action': 'expanded', 'status': '2.0.4'}]}]},), {'has_original': False, 'recipients': [['f@x', 'ok'], ['g@x', 'ok']], 'valid': True}), ('not a report', ({'type': 'multipart/mixed', 'params': {}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False})], 5: [('capitalised parameter name', ({'type': 'multipart/report', 'params': {'Report-Type': 'Delivery-Status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'a5@x', 'action': 'failed', 'status': '5.1.1'}]}, {'type': 'message/rfc822'}]},), {'has_original': True, 'recipients': [['a5@x', 'hard']], 'valid': True}), ('internationalised status part', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global-delivery-status', 'recipients': [{'final': 'b@x', 'action': 'delayed', 'status': '4.4.5'}]}]},), {'has_original': False, 'recipients': [['b@x', 'delayed']], 'valid': True}), ('global message is not a status', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/global', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False}), ('status class decides', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'c@x', 'action': 'failed', 'status': '4.2.2'}, {'final': 'd5@x', 'action': 'failed', 'status': '2.0.0'}]}]},), {'has_original': False, 'recipients': [['c@x', 'soft'], ['d5@x', 'unknown']], 'valid': True}), ('padded capitalised action', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': ' e@x ', 'action': ' Failed ', 'status': ' 5.7.5'}]}, {'type': 'text/rfc822-headers'}]},), {'has_original': True, 'recipients': [['e@x', 'hard']], 'valid': True}), ('relayed and expanded', ({'type': 'multipart/report', 'params': {'report-type': 'delivery-status'}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': [{'final': 'f@x', 'action': 'relayed', 'status': '2.0.0'}, {'final': 'g@x', 'action': 'expanded', 'status': '2.0.5'}]}]},), {'has_original': False, 'recipients': [['f@x', 'ok'], ['g@x', 'ok']], 'valid': True}), ('not a report', ({'type': 'multipart/mixed', 'params': {}, 'parts': [{'type': 'text/plain'}, {'type': 'message/delivery-status', 'recipients': []}]},), {'has_original': False, 'recipients': [], 'valid': False})]}
for _label, _args, _expected in _CASES[N]:
    check(_label, solve(*_args), _expected)
print(json.dumps({"observations": observations, "passed": all(x["passed"] for x in observations)}, ensure_ascii=False))
raise SystemExit(0 if all(x["passed"] for x in observations) else 1)
Boundary fixtureActualExpectedOutcome
capitalised parameter name{'has_original': True, 'recipients': [['a1@x', 'hard']], 'valid': True}{'has_original': True, 'recipients': [['a1@x', 'hard']], 'valid': True}Passed
internationalised status part{'has_original': False, 'recipients': [['b@x', 'delayed']], 'valid': True}{'has_original': False, 'recipients': [['b@x', 'delayed']], 'valid': True}Passed
global message is not a status{'has_original': False, 'recipients': [], 'valid': False}{'has_original': False, 'recipients': [], 'valid': False}Passed
status class decides{'has_original': False, 'recipients': [['c@x', 'soft'], ['d1@x', 'unknown']], 'valid': True}{'has_original': False, 'recipients': [['c@x', 'soft'], ['d1@x', 'unknown']], 'valid': True}Passed
padded capitalised action{'has_original': True, 'recipients': [['e@x', 'hard']], 'valid': True}{'has_original': True, 'recipients': [['e@x', 'hard']], 'valid': True}Passed
relayed and expanded{'has_original': False, 'recipients': [['f@x', 'ok'], ['g@x', 'ok']], 'valid': True}{'has_original': False, 'recipients': [['f@x', 'ok'], ['g@x', 'ok']], 'valid': True}Passed
not a report{'has_original': False, 'recipients': [], 'valid': False}{'has_original': False, 'recipients': [], 'valid': False}Passed

SHA-256 / 37779dcd0fc98c9e54becaa6488421fdc0bed82fae5fdd1fbe556c5447b8b3a4

Verification & scope

Stipulated offline model over pre-parsed MIME dictionaries; not a conforming MIME parser, generator or mail client. This reproducer isolates one failure mechanism. Results cover the supplied fixtures. Variants within a family share a test contract and should remain grouped when constructing evaluation splits. Related mechanisms with a shared evaluation_group must also remain together; these controlled models are not independent production incidents.

Observations recorded using Python 3.12.14 at 2026-09-29T14:49:18.703201+00:00.

Case digest / 5113cc0a241a0d418c15b691f12badd4a8238fe641c020d580d759025f4f8ad0