Testing SMTP host with telnet
From Peter Pap's Technowiki
Revision as of 04:46, 3 June 2013 by Ppapa (talk | contribs) (Created page with "1. Telnet to port 25 on the host: telnet smtp.yourdomain.com 25 You should see something like: Trying X.X.X.X... Connected to smtp.yourdomain.com. Escape character is...")
1. Telnet to port 25 on the host:
telnet smtp.yourdomain.com 25
You should see something like:
Trying X.X.X.X... Connected to smtp.yourdomain.com. Escape character is '^]'. 220 smtp.yourdomain.com ESMTP Sendmail 8.14.4/8.14.4; Mon, 16 May 2011 04:34:09 GMT
2. Respond with
HELO somedomain.com
You should see something like:
HELO somedomain.com.com 250 smtp.yourdomain.com Hello somedomain.com [X.X.X.X], pleased to meet you
3. Tell it where the mail is from:
MAIL FROM: me@somedomain.com
You should see something like:
250 2.1.0 me@somedomain.com... Sender ok
4. Tell it who the recipient is:
RCPT TO: somedude@somedomain.com
You should see:
250 2.1.5 somedude@somedomain.com... Recipient ok
5. Compose the email:
DATA SUBJECT: testing mail hello. this is a test. .
You should see:
DATA 354 Enter mail, end with "." on a line by itself SUBJECT: testing mail hello. this is a test. . 250 2.0.0 r534bJIb013152 Message accepted for delivery
