SMTP2GO experienced a minor incident on September 29, 2026 affecting Email sending (SMTP service), lasting 1h 51m. The incident has been resolved; the full update timeline is below.
Affected components
Update timeline
- identified Sep 29, 2026, 08:31 PM UTC
Inbound processing time has decreased due to higher than usual demand. We are adding network capacity to address this.
- resolved Sep 29, 2026, 10:23 PM UTC
This incident has been resolved.
- postmortem Sep 29, 2026, 10:54 PM UTC
We investigated reports of SMTP connection timeouts and found that some of our incoming mail servers had accumulated stuck mail-handling processes. These processes were consuming excessive processing power, reducing the servers’ capacity to handle other connections and potentially causing slow responses or timeouts. Our investigation identified a possible fault in the handling of an SMTP authentication method. Diagnostic checks showed a process attempting to respond after a connection had closed. We are investigating whether this caused the processes to become stuck; the exact trigger has not yet been confirmed. Actions removed the observed resource buildup, but we are continuing to monitor for recurrence. We are preparing mail-server software updates and assessing whether they address the underlying fault. We are also evaluating a safeguard to detect and clear stuck processes before they affect service.