I have already fixed this issue. It was caused by amavis. Thanks for help.
Found that CLI functions sendmail and mail can reproduce issue. But still webmail and thuderbird is working..
It's 3.1.13 Really strange for me is in log above: Name service error for name=localhost type=A: Host not found, try again Why is there...
Hello, im facing very interesting issue. Im using Postfix with ISPConfig 3 + Dovecot + Roundcube To allow users to set email forwarding im using...
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