http://wiki2.dovecot.org/Pigeonhole/ManageSieve/Troubleshooting

Try the gnutls command line interface:

gnutls-cli --starttls --print-cert -p 4190 example.com STARTTLS Ctrl-D LOGOUT

Regards Daniel

Ah, thanks! Pretty dumb of openssl not to be able to connect arbitrary servers... in a useful way, that is.

Daniel

-- LÉVAI Dániel PGP key ID = 0x83B63A8F Key fingerprint = DBEC C66B A47A DFA2 792D 650C C69B BE4C 83B6 3A8F