Outage in No-IP
Alternate port SMTP delivery problems
Resolved MinorIncident Report
Summary AI Generated
No-IP's alternate port SMTP service experienced delivery failures for approximately 3.7 hours due to a routing problem affecting part of the mail server network. A temporary reroute was applied as a workaround, though mail sent to group addresses or forwards remained at risk of bouncing during this period. Connectivity was restored and the queue backlog cleared, with all systems confirmed operational by resolution.
We are seeing delivery problems on our alternate port SMTP service. The
cause is a routing problem affecting part of the network our mail servers
send from. Our team is working on a fix.
We have a temporary reroute in place to keep traffic moving while we sort
out the underlying problem. One known limitation: mail sent to a group
address or through a forward may still bounce, depending on how the
receiving side is configured.
We will post an update here as soon as we know more.
Components affected
No-IP Alternate-port SMTPTrusted by 1,000+ teams
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Latest Updates ( sorted recent to last )
RESOLVED
5 days ago - at 08/31/2026 11:04PM
The issue affecting Alternate Port SMTP has been resolved the queue backlog as normalized. All systems are operational.
MONITORING
5 days ago - at 08/31/2026 08:09PM
Connectivity has been restored. Alternate port SMTP mail that was delayed is now moving through the queue and being delivered. Expect queue delays for the next hour or so while the backlog processes. We will continue monitoring.
IDENTIFIED
5 days ago - at 08/31/2026 07:23PM
We are seeing delivery problems on our alternate port SMTP service. The
cause is a routing problem affecting part of the network our mail servers
send from. Our team is working on a fix.
We have a temporary reroute in place to keep traffic moving while we sort
out the underlying problem. One known limitation: mail sent to a group
address or through a forward may still bounce, depending on how the
receiving side is configured.
We will post an update here as soon as we know more.
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