When I want to check if an IMAP server is working properly, I telnet it and run basics commands.
Here are (IMAP) commands that I keep using.
Either connect to the IMAP (clear text) port:
# telnet FQDN 143
Or connect to the TLS IMAP port:
# openssl s_client -connect FQDN:993
In both case, the server should reply something like:
* OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE AUTH=PLAIN] Dovecot ready.
when it is ready to play with you.
Continue reading “My IMAP cheat sheet”