Is someone has successfully succeeded to use SSL with dovecot-imapd and dovecot-pop3d. Each time I try to activate it the IMAP/POP3 daemon becomes unavalaible for non SSL users
Side-note: is it possible to use same certificate as the Let’s Encrypt used for Web encryption ? or should I indicate the fqdn of my server for users ? so it presents the certificate of server and not having the usual issue of certificate not going with domain used for IMAP/PO3 connection !!
You should use a certificate for the mail server domain. If you main certificate covers wildcard, like *.domain.tld, its not a problem using the same on everything.
Your question about the unavailable daemon for non-SSL users, is that you wont force SSL connections? Just setup for who want to use?
If you want that your users connects under your mail.domain.tld you should have just 1 certs. But if your client tries to connect using mail.clientdomain.tld the certificate will not cover that domain, and should appear and advice of the irregularity of certificate.