telnet Mail commands

The a4msl9ux and ZvVx9G1hcg= are the base24 encoded values of email id and its password. You can get the encoded value from the follwoing url. paste the emaild and click on "Convert the source data. Likewise password.

http://www.motobit.com/util/base64-decoder-encoder.asp



> telnet domain.com 25
Trying ::1...
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
220 something.fake ESMTP Sendmail 8.12.11/8.12.11/SuSE Linux 0.6; Wed, 2 Apr 2003 15:13:01 -0700
EHLO domain.com
250-something.fake Hello localhost [127.0.0.1], pleased to meet you
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-8BITMIME
250-SIZE
250-DSN
250-ETRN
250-AUTH LOGIN PLAIN
250-DELIVERBY
250 HELP
AUTH LOGIN
334 VXNlcm5hbWU6
a4msl9ux
334 UGFzc3dvcmQ6
ZvVx9G1hcg==
235 2.0.0 OK Authenticated
MAIL FROM: me@domain.com
250 2.1.0 me@something.fake... Sender ok
RCPT TO: you@yourdomain.com
250 2.1.5 you@nowhere.land... Recipient ok
DATA
354 Enter mail, end with "." on a line by itself
This is a test
.
250 2.0.0 h12MD1qV026715 Message accepted for delivery
QUIT
221 2.0.0 something.fake closing connection
Connection closed by foreign host.





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If no AUTH is there tyr below.

The first thing to do is to open a connection from your computer to your mail server.
telnet mail.domain.ext 25
You should receive a reply like:
Trying ???.???.???.???...
Connected to mail.domain.ext.
Escape character is '^]'.
220 mail.domain.ext ESMTP Sendmail ?version-number?; ?date+time+gmtoffset?

You will then need to delcare where you are sending the email from:
HELO local.domain.name - dont worry too much about your local domain name although you really should use your exact fully qualified domain name as seen by the outside world the mail server has no choice but to take your word for it as of RFC822-RFC1123.
This should give you:
250 mail.domain.ext Hello local.domain.name [loc.al.i.p], pleased to meet you

Now give your email address:
(On many mailservers the space after the : is required rather that optional. Thanks to Justing Goldberg)
MAIL FROM: mail@domain.ext
Should yeild:
250 2.1.0 mail@domain.ext... Sender ok
If it doesn't please see possible problems.

Now give the recipients address:
RCPT TO: mail@otherdomain.ext
Should yeild:
250 2.1.0 mail@otherdomain.ext... Recipient ok
If it doesn't please see possible problems.

To start composing the message issue the command DATA

If you want a subject for your email type Subject:-type subject here- then press enter twice (these are needed to conform to RFC 882)

You may now proceed to type the body of your message (e.g. hello mail@otherdomain.ext from mail@domain.ext)

To tell the mail server that you have completed the message enter a single "." on a line on it's own.
The mail server should reply with: 250 2.0.0 ???????? Message accepted for delivery

You can close the connection by issuing the QUIT command.
The mailserver should reply with something like:221 2.0.0 mail.domain.ext closing connection
Connection closed by foreign host.



Here are a list of problems I've encountered and their fixes
501 nouser@nosuchplace.here... Sender domain must exist
The domain that you are sending from must exist

503 Need MAIL before RCPT
A recipient has been specified before a sender.

550 mail@domain.ext... Relaying Denied