Testing An Email Server Using Telnet
August 23 2007
(All commands are in bold)
SMTP test
C:> telnet mail.somedomain.com 25
Trying A.B.C.D...
Connected to mail.somedomain.com.
Escape character is '^]'.
220 mail.somedomain.com ESMTP Exim 4.04 Wed, 13 Nov 2002 16:27:42 -0700
helo someotherdomain.com
250 mail.somedomain.com Hello someotherdomain.com [E.F.G.H]
mail from:
250 OK
rcpt to:
250 Accepted
data
354 Enter message, ending with "." on a line by itself
Subject:Test Message
This is a test message. .
250 OK id=18C6vd-0005Ey-00
quit
221 mail.somedomain.com closing connection
Connection closed by foreign host
C:>
POP3 test
C:> telnet mail.somedomain.com 110
Trying 10.0.0.12...
Connected to mail.somedomain.com.
Escape character is '^]'.
+OK POP3 mailsomedomain.com v2000.69rh server ready
USER username@domain.name <or> domain\userid
+OK Password required for <account name>.
PASS <password>
+OK <account name> has <#> message(s) (xyz) octets
QUIT
+OK Sayonara
Connection closed by foreign host.