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Mailgun: Elevated inbound recipient rejected

No impact listedStatus: resolvedStarted Resolved (-7382 min)1 updatestspg.io (opens in new tab)

Timeline of updates

  1. resolved

    On November 13th, Mailgun incorrectly rejected a subset of inbound emails with a 550 "recipient rejected" error. Senders received bounce notifications even though delivery should have succeeded.

    Affected timeframes:
    US region: 05:14 to 06:41 UTC and 14:55 to 15:48 UTC
    EU region: 14:55 to 15:48 UTC

    Based on our analysis, approximately 25% of US inbound traffic and 50% of EU inbound traffic had a chance to have been impacted during these windows. We're unable to provide exact counts due to gaps in our logging for rejected inbound mail, which we have since corrected.

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Impact, status and times are the vendor’s own, as last archived. View on stspg.io (opens in new tab).

Cite this

Status incident (vendor impact label: none) posted by Mailgun, started 2025-11-18 13:31 UTC, resolved after -7382 min, 1 update(s).

Title
Elevated inbound recipient rejected
Vendor
Mailgun
Date
URL
https://rewindex.com/company/mailgun/incidents/1zqbbm3y1021

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