Front: [smtp] Problems with outbound sending on custom SMTP channels

Impact: majorStatus: resolvedStarted 2026-10-05 07:42 UTCResolved 2026-10-05 09:45 UTC (2.0 h)4 updatesSource: stspg.io

Summary

Front reported a major outage affecting outbound sending on a subset of custom SMTP channels, listed as SMTP (non-Gmail / O365). It started at 2026-10-05 07:42 UTC and was resolved at 2026-10-05 09:45 UTC, lasting 2 h 2 min. Front deployed a fix but did not specify the cause.

Machine-written from the archived incident (Sol). Check the timeline before relying on it.

Affected components: SMTP (non-Gmail / O365)

Timeline of updates

investigating2026-10-05 07:42 UTC
We are investigating a spike in failures for outbound sending on a subset of custom SMTP channels.
identified2026-10-05 08:34 UTC
We believe we have identified the cause and are deploying a fix.
monitoring2026-10-05 09:13 UTC
The fix is deployed and the problem appears to be resolved. We are continuing to monitor.
resolved2026-10-05 09:45 UTC
This incident has been resolved.

Rewindex changes for this incident

Major incident: [smtp] Problems with outbound sending on custom SMTP channels 2026-10-05 07:42 UTC

Impact, status and times are the vendor’s own, as last archived. View on stspg.io (opens in new tab). Front profile · Recent Front incidents · Markdown · JSON