I am new to operating an email server (postfix + dovecot), and things seem to be working with my preferred email client (mutt), but when I try to use thunderbird, thunderbird fails to connect (and offers no useful information) and I get one SSL error in my server log for POP3 and one for SMTP (shown with linebreak for readability):
Error:
dovecot: pop3-login: Error: SSL: Stacked error: error:14094414:SSL routines:
ssl3_read_bytes:sslv3 alert certificate revoked: SSL alert number 44
postfix/smtps/smtpd[1649]: SSL_accept error from unknown[###]: lost connection
Questions:
What do these errors mean?
In the first one, is thunderbird rejecting a certificate given my the server, or is the server rejecting a certificate given by thunderbird?
Does the first error mean that thunderbird is using SSLv3? Doesn't that have a vulnerability?
When I connect to the server on the POP3 port using openssl s_client
it says the certificates look fine. Also, openssl
also says it is using TLSv1.2.