Qmail Cluster Issues

Message

Our Qmail cluster was experiencing some issues earlier this morning.

For an unknown reason which is still being  investigated, qmail stopped closing connections correctly and eventually ran out of available connections causing the outages.

Forcefully killing off the stuck qmail processes and restarting qmail fixed the issues, and it's still being monitored

UPDATE: 12:24

On further investigation our technical team found some other issues, which would have impacted end users

In essence LDAP had issues. As LDAP looks after all authentication then other services would have appeared to be degraded.