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I checked dovecot.conf, and the cert are shown like this... Is the "<" sign on purpose ??? Don't see why it would be there ....
ssl_cert = </etc/dovecot/private/ssl-cert-and-key.pem
ssl_key = </etc/dovecot/private/ssl-cert-and-key.pem
Well, that's something new. Just tell me something. What is postfix in this ? I'm not familiar with the mail architecture. I thought Postfix what the IMAP/POP server.
Anyway. Seems that courier is not running.
[~]$ sudo ps aux | grep courier
akim 599 0.0 0.0 103304 860 pts/0 S+...
Hey Rob. Have you found a workaround ? I'm in similar situation since beginning of April. It was perfectly working until 1st or 2nd of April and it stopped suddently to work. Can't pinpoint what happened in between.
ss -lnp|grep -E '143|993'
No result
Attached iptables output. Note that the huge droplist is due to the fact I use spamhaus drop.
Note that even if I stop iptables service, it still does not work.
No luck with previous master.cf and main.cf.
What I don't get is that as soon as I try an auth login, I'm ejected from the server:
Connected to mail.domain.ltd.
Escape character is '^]'.
220 plesk.mydomain.ltd ESMTP Postfix
starttls
220 2.0.0 Ready to start TLS
auth login
Connection closed by...
Birger, the issue you have is not the same as mine. Your problem is known: Outlook does not support DIGEST-MD5.
UFHH01, Dave, you'll find attached my master.cf file and master.cf. Hope that's what you mean by "pastebin"
For now, as an emergency alternative, I've configured mail redirection for my users. At least they can receive new mails. However for sure I will need to fix this. If you have more ideas ? log where I can look ? Any help welcome.
From my side, next step would be to upgrade to 12.5... Not sure...
I tried to install a self-signed certificate for dovecot with the script the provide. But then it doesn't start and say something else. But I guess it's because it starts from antoher location.
Anyway, the issue is still the same. The error message is instantaneous. No connection possible to...
Your idea was good, however the command you proposed did not work (for whatever reason). But I did this form the panel, and I replaced postfix with qmail. Same issue. Back to postfix. Same issue.
So I tried Dovecot.
And Dovecot fail to start with following message:
Starting Dovecot Imap...