I have some issue with lets encrypt certificate on one of my subdomains - mail.programyzadarmo.net.pl. It worked but for some reason letencrypt auto renew has stopped working so yesterday I generated a new auto certificate using the DirectAdmin panel. I have no issues for programyzadaro.net.pl domain and blog subdomain but mail.programyzadarmo.net.pl shows wrong date - https ssl certicate will be served with a valid time of: Sat, 17 Aug 2044 .
My domain is: programyzadarmo.net.pl
The operating system my web server runs on is - Centos 7.9
I can login to a root shell on my machine - Yes
I'm using a control panel to manage my site - Direct Admin
I know nothing about DirectAdmin so I won't be able to help here but yesterday you renewed the certificate for your domain mail.programyzadarmo.net.pl and it is the cert shown when reaching your site here https://mail.programyzadarmo.net.pl but you are serving a self-signed certificate when you try to reach your server using smtp and imap ports.
This is certificate served:
Issuer: C = GB, ST = Someprovince, L = Sometown, O = none, OU = none, CN = localhost, emailAddress = webaster@localhost
Validity
Not Before: May 13 00:13:50 2016 GMT
Not After : Sep 28 00:13:50 2043 GMT
So you should try to know why your DirectAdmin panel is using this certificate for smtp and imap instead of your renewed and valid certificate.
