a CAPABILITy a LOGIN "user" "password" a LIST "" * a SELECT INBOX a FETCH 1 RFC822 a STORE 1 +FLAGS (\Seen \Deleted) a CLOSE a EXPUNGE a SEARCH a LOGOUT HELO/EHLO MAIL DATA RST VRFY EXPN NOOP QUIT Reply-To: Recipient: From: To: Date: Subject: Message-ID: MIME-Type: Content-Transfer-Encoding: Content-Type: User-Agent: X-Assp-..: X-Recipient: Deliverd-To: