hello, they are already installing.
I think there are no problems with port 25 since it is not blocked, I did the telnet test to google and it works, even so, just in case I added it to ufw but there are no changes.
I think the problem, according to the mail log, is that the service does not start due to an error.
`root@server1:/home/diego# systemctl stop postfix
root@server1:/home/diego# systemctl start postfix
root@server1:/home/diego# systemctl status postfix
● postfix.service - Postfix Mail Transport Agent
Loaded: loaded (/lib/systemd/system/postfix.service; enabled; vendor preset: enabled)
Active: active (exited) since Sun 2021-03-21 19:14:59 -03; 27s ago
Process: 29239 ExecStart=/bin/true (code=exited, status=0/SUCCESS)
Main PID: 29239 (code=exited, status=0/SUCCESS)
mar 21 19:14:59 server1 systemd: Starting Postfix Mail Transport Agent...
mar 21 19:14:59 server1 systemd: Started Postfix Mail Transport Agent.
root@server1:/home/diego# systemctl status dovecot
● dovecot.service - Dovecot IMAP/POP3 email server
Loaded: loaded (/lib/systemd/system/dovecot.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Sun 2021-03-21 19:10:28 -03; 5min ago
Process: 28938 ExecStart=/usr/sbin/dovecot -F (code=exited, status=89)
Main PID: 28938 (code=exited, status=89)
mar 21 19:10:28 server1 systemd: Started Dovecot IMAP/POP3 email server.
mar 21 19:10:28 server1 dovecot: doveconf: Fatal: Error in configuration file /etc/dovecot/conf.d/10-ssl.conf line 14: ssl_cert: Can't open file /etc/pki/dovecot/certs/dovecot.
mar 21 19:10:28 server1 systemd: dovecot.service: Main process exited, code=exited, status=89/n/a
mar 21 19:10:28 server1 systemd: dovecot.service: Failed with result 'exit-code'.
according to this, I see an ssl error, those certificates do not exist in the system.