clarification with thunderbird setings

I don't know.  Google is sending everything to spam on different severs.  I am using tbird client.  When I set up an account I normally use mail.mydomain.com for smtp and imap.  But when I do that, tbird throws an error saying certificates dont match.   When I view the certificate from letsencrypt it says server.mydomain.com and not mail.mydomain.com

Can someone help me stratighten this mess out.?

Now I just tried sending from a different domain and the LE cert says common name is www.mydomain.com

Thanks.

I am also getting this error message in tbird when I send mail.

Unable to communicate securely with peer: requested domain name does not match the server’s certificate.

I am also getting this error message in tbird when I send mail.

Unable to communicate securely with peer: requested domain name does not match the server’s certificate.

Just got that also after the update today to 0.9.8.1084

Rebuild your Postfix configuration and that should go away.

I don't know.  Google is sending everything to spam on different severs.  I am using tbird client.  When I set up an account I normally use mail.mydomain.com for smtp and imap.  But when I do that, tbird throws an error saying certificates dont match.   When I view the certificate from letsencrypt it says server.mydomain.com and not mail.mydomain.com

Can someone help me stratighten this mess out.?

Now I just tried sending from a different domain and the LE cert says common name is www.mydomain.com

Thanks.

Under your SSL Certificates, make you you have the Mail service added.

Then in your DNS:
Create MX record: mail MX 0 mail.domain.com
Then create an A record for mail 1.2.3.4

SMTP should use StartTLS, while incoming should use SSL/TLS

We currently use Thunderbird 91.1.1