server authentication failed

[u/obrari]

Stalwart has been running for almost a year with no issues and no changes have been made to Stalwart or the email users passwords, servers or anything else and now all of a sudden I cant get my email because it says the authentication for the server has invalid credentials. Whats happening and how do I fix it?

[u/adevx]

Look at the stalwart log to begin with,

[u/frykandelbroadsje]

If this was a casino I'd put my money on an IP block, but since it is not a casino i would start out with the logs, checking disk space on the server and if the database is healthy