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Old 04-14-2003, 11:53 AM   #1
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Question How to test an email server without an MX record?

I need to test the postfix setup on my firewall machine, to make sure it's actually going to work (filter and forward). The problem is I don't have access to update the MX record to point to it. So when I send email to our domain, it goes to our old mail server, right around the server to be tested. Is there any way to send a mail message to a server by ip?
Old 04-16-2003, 03:21 PM   #2
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Registered: Apr 2003
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Here's one way:

Read RFC 2821

telnet ip address smtp

now you're connected to your SMTP server.

now use what you found in that RFC to compose a message, for example:

Connected to cooter.
Escape character is '^]'.
mail from:
250 ok
rcpt to:
250 ok
354 go ahead
subject: test

just a test
250 ok 1050520336 qp 12583
Connection closed by foreign host.
Old 04-24-2003, 07:27 PM   #3
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I gave a similar explanation here:

The only difference is I would type "telnet 25"


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