Probando IMAP/SSL

$ openssl s_client -connect mazatl.cie.unam.mx:993 -CAfile /etc/pki/CA/CA-cie.crt 
CONNECTED(00000003)
depth=1 /C=MX/ST=Morelos/L=Temixco/O=Centro de Investigaci\xC3\xB3n en Energ\xC3\xADa/OU=Unidad de C\xC3\xB3mputo/CN=CIE-UNAM UC root SSL CA
verify return:1
depth=0 /C=MX/ST=Morelos/L=Temixco/O=Centro de Investigaci\xF3n en Energ\xEDa/CN=mazatl.cie.unam.mx/emailAddress=uc@cie.unam.mx
verify return:1
---
Certificate chain
 0 s:/C=MX/ST=Morelos/L=Temixco/O=Centro de Investigaci\xF3n en Energ\xEDa/CN=mazatl.cie.unam.mx/emailAddress=uc@cie.unam.mx
   i:/C=MX/ST=Morelos/L=Temixco/O=Centro de Investigaci\xC3\xB3n en Energ\xC3\xADa/OU=Unidad de C\xC3\xB3mputo/CN=CIE-UNAM UC root SSL CA
---
Server certificate
-----BEGIN CERTIFICATE-----
[BLA BLA BLA]
-----END CERTIFICATE-----
subject=/C=MX/ST=Morelos/L=Temixco/O=Centro de Investigaci\xF3n en Energ\xEDa/CN=mazatl.cie.unam.mx/emailAddress=uc@cie.unam.mx
issuer=/C=MX/ST=Morelos/L=Temixco/O=Centro de Investigaci\xC3\xB3n en Energ\xC3\xADa/OU=Unidad de C\xC3\xB3mputo/CN=CIE-UNAM UC root SSL CA
---
[BLA BLA BLA]
---
* OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE AUTH=PLAIN] Dovecot ready.
01 LOGIN sshdcg 3.1415926535897932384626433832795028841971693993751058209749...
01 OK [CAPABILITY IMAP4rev1 LITERAL+ SASL-IR LOGIN-REFERRALS ID ENABLE SORT SORT=DISPLAY THREAD=REFERENCES THREAD=REFS MULTIAPPEND UNSELECT IDLE CHILDREN NAMESPACE UIDPLUS LIST-EXTENDED I18NLEVEL=1 CONDSTORE QRESYNC ESEARCH ESORT SEARCHRES WITHIN CONTEXT=SEARCH LIST-STATUS] Logged in
02 LOGOUT
* BYE Logging out
02 OK Logout completed.
closed