I have a customer on a virtual domain whose ISP blocks port 25. I have gone through the forum and docs and follow the instructions to enable submission (587) and smtps (465) in postfix. I can telnet to both ports on my server which means they are open.
When I try using an email client to send mail using SSL on both ports, it always results in a timeout. I check the maillogs, it shows that the following
Jun 29 22:11:09 ns5 postfix/smtpd: fatal: No server certs available. TLS can't be enabled Jun 29 22:11:10 ns5 postfix/master: warning: process /usr/libexec/postfix/smtpd pid 4437 exit status 1 Jun 29 22:11:10 ns5 postfix/master: warning: /usr/libexec/postfix/smtpd: bad command startup -- throttling
can you please advise what I can do about this?