* OK [CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE LITERAL+ AUTH=PLAIN] Dovecot (Ubuntu) ready.
* CAPABILITY IMAP4rev1 SASL-IR LOGIN-REFERRALS ID ENABLE IDLE LITERAL+ AUTH=PLAIN
A001 OK Pre-login capabilities listed, post-login capabilities have more.
* ID ("name" "Dovecot")
A002 OK ID completed.
A003 BAD Error in IMAP command received by server.
* BYE Logging out
A004 OK Logout completed.

+OK Dovecot (Ubuntu) ready.
+OK
CAPA
TOP
UIDL
RESP-CODES
PIPELINING
AUTH-RESP-CODE
USER
SASL PLAIN
.