I
import
Unregistered / Unconfirmed
GUEST, unregistred user!
SMTP: HELLO (HELO)
MAIL (MAIL)
RECIPIENT (RCPT)
DATA (DATA)
SEND (SEND)
RESET (RSET)
VERIFY (VRFY)
EXPAND (EXPN)
HELP (HELP)
NOOP (NOOP)
QUIT (QUIT)
TURN (TURN)
POP3:
USER
PASS
QUIT
STAT
LIST
RETR
DELE
NOOP
RSET
TOP
UIDL
APOP
MAIL (MAIL)
RECIPIENT (RCPT)
DATA (DATA)
SEND (SEND)
RESET (RSET)
VERIFY (VRFY)
EXPAND (EXPN)
HELP (HELP)
NOOP (NOOP)
QUIT (QUIT)
TURN (TURN)
POP3:
USER
PASS
QUIT
STAT
LIST
RETR
DELE
NOOP
RSET
TOP
UIDL
APOP