SMTP2GO: Softbounce Errors

What to do

Check whether you use SMTP2GO Email sending (SMTP service). Check your stack
Paste a package.json, lockfile, Terraform or a list of domains at down.guide/stack to see every provider you depend on.
Confirm your retries, queues and scheduled jobs caught up after the 2h 20m it lasted.
Anything that failed between 2026-10-15 15:03 UTC and 2026-10-15 17:23 UTC may need a replay.
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investigatingOct 15, 2026, 3:03 PM UTC
The team recently updated how our servers process traffic. Specifically, SMTP (https://www.rfc-editor.org/info/rfc5321/#section-2.3.8) requires 0x0d immediately before 0x0a; a recent patch to Exim against "SMTP smuggling" has altered its behavior when it encounters a missing 0x0d. The team is looking into rolling back this update, but in the meantime, we are suggesting connecting to 45.33.50.34, 43.228.184.6, or 45.33.53.153 instead of the mail.smtp2go.com hostname as a potential workaround.
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resolvedOct 15, 2026, 5:23 PM UTC
This incident has been resolved.
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Reports count in aggregate; nothing about you is shown.

None so far.

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Is SMTP2GO still down?

No, this incident was resolved 2026-10-15 17:23 UTC. For SMTP2GO's live state, see https://down.guide/smtp2go.

How long did it last?

2h 20m, from 2026-10-15 15:03 UTC to 2026-10-15 17:23 UTC, by the times SMTP2GO posted.

What was affected?

SMTP2GO named Email sending (SMTP service).

What caused it?

SMTP2GO hasn't published a root cause. If it does, it shows here.

Where does this come from?

SMTP2GO's official status page, https://smtp2gostatus.com, quoted verbatim. down.guide's own probes, reports and social counts are labeled as ours.