I installed ispconfig a few days ago. The server is server1.perelon.com.br. On this server I have 2 domains: perelon.com.br and aprendacomjogos.com.br. Today I installed Letsencrypt certificates, first on aprendacomjogos.com.br and then perelon.com.br. When requestinf the certificates I request certificates for the sub domains (using the -d flag) www and mail for each of the certificates. The certificates work fine for the websites ( that is, they go directly to https:// without any errors or problems). My problem is with email. I use Thunderbird and when I try to create an email account, when I change the POP3 port from 110 to 995, I get an error message that Thunderbird can't fine the configuration for this email account. If I change the port back to 110, the error goes away. What do I need to do to secure the email?
Did you set up dovecot to use that same LE certificate? And restart dovecot so it sees the certificate? See in excellent document by @ahrasis https://www.howtoforge.com/communit...l-port-8080-with-lets-encrypt-free-ssl.75554/
Thanks, Taleman. Unfortunately, I still have the problem. First, I'm using courier, not dovecot. I looked at the link you provided and followed the instructions for both postfix and courier. When I change the Pop3 port to 995, I still get the error message. However, if I leave the Pop3 port as 110 and change the smtp port to 587, I don't get the error message. But I don't remember testing for this (using port 110 for Pop3 AND 587 for smtp before, so I can't really say if following the instructions for postfix fixed a problem or if there wasn't a problem with the smtp port before.). The bottom line is that I can use SSL for smtp, but not pop3. Any other ideas?
