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notify/email: report failure reason from SMTP reply codes
- #5533
#5533
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MU5A
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notify/email: report failure reason from SMTP reply codes
#5533
MU5A
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prometheus:main
prometheus/alertmanager:main
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MU5A:email-failure-reason
MU5A/alertmanager:email-failure-reason
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Commits on Sep 1, 2026
notify: add GetFailureReasonFromSMTPCode for SMTP-based notifiers
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notify/email: report failure reason from SMTP reply codes
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notify/email: assert failure reason in TestEmailRejected
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Commits on Sep 2, 2026
Merge branch 'main' into email-failure-reason
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Commits on Sep 3, 2026
Merge branch 'main' into email-failure-reason
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