$ telnet-ssl  -z ssl imap.yandex.ru imaps 
Trying 87.250.250.124...
Connected to imap.yandex.ru.
Escape character is '^]'.
* OK Yandex IMAP4rev1 at imap15g.mail.yandex.net:993 ready to talk with 24.2.252.8:42823, 2013-Dec-14 00:05:33, V5PajE3m64YO
1 login roman-yepishev "***"
1 OK LOGIN completed
1 select inbox
[...]
1 close
1 OK close complete.
1 select inbox
* FLAGS (\Answered \Seen \Draft \Deleted $Forwarded)
* 1 EXISTS
* 0 RECENT
* OK [PERMANENTFLAGS (\Answered \Seen \Draft \Flagged \Deleted $Forwarded \*)] Limited
* OK [UIDNEXT 23396] Ok
* OK [UIDVALIDITY 1274466921] Ok
1 OK [READ-WRITE] select completed
1 fetch 1 flags
* 1 FETCH (FLAGS (\Seen))
1 OK fetch completed
1 store 1 +FLAGS (shopping)
* 1 FETCH (UID 23394 FLAGS (\Seen shopping))
1 OK store completed
1 close
1 OK close complete.
1 select inbox
* FLAGS (\Answered \Seen \Draft \Deleted $Forwarded)
* 1 EXISTS
* 0 RECENT
* OK [PERMANENTFLAGS (\Answered \Seen \Draft \Flagged \Deleted $Forwarded \*)] Limited
* OK [UIDNEXT 23396] Ok
* OK [UIDVALIDITY 1274466921] Ok
1 OK [READ-WRITE] select completed
1 fetch 1 flags
* 1 FETCH (FLAGS (\Seen))
1 OK fetch completed