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Setting up a backup mail server, and I cannot figure out a to test it without bringing anything down.

I have a backup mail server which I am configuring, and I think I have it all configured the problem is I can't test this setup without bringing down our primary mail server.  Is there a way, like a host file for sendmail on a test email server that I can configure to simulate a primary mail server down situation, or should I approach this a different way?
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jgbauer
Asked:
jgbauer
2 Solutions
 
bobgunzelCommented:
http://www.dnsreport.com and http://www.checkdns.net will do some basic testing.
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ChireruCommented:
Run a telnet to the secondary server like so:

<=type, >=recieve from server

< telnet mx2.mydomain.com 25
>220 mydomain.com
< helo test.mydomain.com
>250 helo
< mail from: my@emailaddress.com
>250 OK
< rcpt to: another@email.com
>250 OK
< data
>354 begin
<To: another@email.com
<From: my@emailaddress.com
<Subject: This is a test
<
<If this is set up properly, the headers of this email should read "received from [your IP], received from secondary mx, then delievered by the primary mx."
<.

Try it using an email address on the secondary, then try it again using an email somewhere else that you can check (it should DENY the message to a non-yourdomain address).
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Cyclops3590Commented:
No comment has been added to this question in more than 21 days, so it is now classified as abandoned.
I will leave the following recommendation for this question in the Cleanup topic area:
Split: bobgunzel & Chireru

Any objections should be posted here in the next 4 days. After that time, the question will be closed.

Cyclops3590
EE Cleanup Volunteer
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