imap telnet session

connectconnect

clear-text

telnet IMAP_SERVER 143

starttls

openssl s_client -starttls imap -connect IMAP_SERVER:143 -quiet -crlf

implicit ssl

openssl s_client -starttls imap -connect IMAP_SERVER:993 -quiet -crlf

more options

# -tls1
# -tls1_2

proceedproceed

1 login TEST_ACCOUNT PASSWORD
1 list "" "*"
1 logout

troubleshootingtroubleshooting

you need -crlf to talk to an Exchange server