All emails was working, all sending and receiving were working - until today. What happened was that I tried to connect to an external SMTP (via Custom Settings in SMTP Settings). But since it failed, I returned the settings back to “Mail Server Settings”. But when I do a “send test email” - the system shows a connection timeout.
All emails created (to internal email in on-site onlyoffice) fails with Message Delivery Failure : Connection Reset by Peer.
all emails are not working anymore
Installation is in Ubuntu using Docker. if I do a docker ps - the mail docker seems to be running. help please?