Mengecek Protocol IMAP dengan Command Telnet

Untuk melakukan pengecekan mailbox maupun koneksi email dari client ke mail server menggunakan protocol IMAP dapat dilakukan dengan perintah telnet.

Pertama yang diperlukan adalah :
- Internet connection yang aktif
- Alamat mail server nya (contoh : mail.domain.ext atau IP nya)
- Username and password email yang aktif

Selanjutnya tinggal buka command prompt atau terminal jika di linux :

C:/> telnet mail.domain.ext 143

atau

$> telnet mail.domain.ext 143
* OK Courier-IMAP ready. Copyright 1998-2002 Double Precision, Inc.


Kemudian Login :

A login me@mydomain.com mypassword

Hasil nya akan seperti ini :
A OK LOGIN Ok.

Pilih folder email nya, biasanya folder inbox :
B select INBOX

Command tersebut akan memberikan kita infomasi mengenai mail folder nya :
* FLAGS (\Draft \Answered \Flagged \Deleted \Seen \Recent)
* OK [PERMANENTFLAGS (\Draft \Answered \Flagged \Deleted \Seen)] Limited
* 0 EXISTS
* 0 RECENT
* OK [UIDVALIDITY 1021381622] Ok
B OK [READ-WRITE] Ok


Setelah selesai, bisa keluar dari telnet dengan cara :
C logout

Output command nya akan seperti ini :
* BYE Courier-IMAP server shutting down
C OK LOGOUT completed


Atau berikut contoh output command yang lainnya :

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.


Semoga bermanfaat untuk pembaca semua.

Dony Ramansyah
site : http://donyramansyah.net
blog : dony-ramansyah.blogspot.com
email : dony.ramansyah[at]gmail.com
Registered linux user : ID 40017