telnet 으로 imap

telnet: > telnet imap.example.com imap telnet: Trying 192.0.2.2… telnet: Connected to imap.example.com. telnet: Escape character is ‘^]’. server: * OK Dovecot ready. client: a1 LOGIN MyUsername MyPassword server: a1 OK Logged in. client: a2 LIST “” “*” server: * LIST (\HasNoChildren) “.” “INBOX” server: a2 OK List completed. client: a3 EXAMINE INBOX server: * FLAGS (\Answered \Flagged \Deleted \Seen \Draft) server: * OK [PERMANENTFLAGS ()] Read-only mailbox. server: * 1 EXISTS server: * 1 RECENT server: * OK [UNSEEN 1] First unseen. server: * OK [UIDVALIDITY 1257842737] UIDs valid server: * OK [UIDNEXT 2] Predicted next UID server: a3 OK [READ-ONLY] Select completed. client: a4 FETCH 1 BODY[] server: * 1 FETCH (BODY[] {405} server: Return-Path: sender@example.com server: Received: from client.example.com ([192.0.2.1]) server: by mx1.example.com with ESMTP server: id <20040120203404.CCCC18555.mx1.example.com@client.example.com> server: for ; Tue, 20 Jan 2004 22:34:24 +0200 server: From: sender@example.com server: Subject: Test message server: To: recipient@example.com server: Message-Id: <20040120203404.CCCC18555.mx1.example.com@client.example.com> server: server: This is a test message. server: ) server: a4 OK Fetch completed. client: a5 LOGOUT server: * BYE Logging out server: a5 OK Logout completed. a1…a5는 클라이언트가 임의로 지정해야하는 “태그”입니다. 아마도 명령어에 대한 ID를 지정하는것 같네요. ( request -> response 의 순서가 비동기? ) RFC에는 아래와 같이 설명되어 있습니다. The client command begins an operation. Each client command is prefixed with a identifier (typically a short alphanumeric string, e.g. A0001, A0002, etc.) called a “tag”. A different tag is generated by the client for each command. 좀 더 자세한 명령어에 대해서는 RFC를 참조하세요. http://tools.ietf.org/html/rfc1730 참고로 SSL로 접속할때는 아래와 같이 하면 됩니다.

openssl s_client -connect imap.example.com:993 -quiet
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