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I have a mail problem that I suspect is really a DNS problem.

My hosting company has apparently given me the subdomain I have another domain,, that points to the same IP as

When I send mail to, I get it. When I said mail to, I get an undeliverable message.

What am I missing?

(I'm on Ubuntu and I'm using Postfix.)

Thanks, Jason

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where are you sending email from? – Philip Reynolds Sep 6 '10 at 21:29
up vote 1 down vote accepted

It probably is a DNS problem.

When I search for the MX record for I get IP-address This is not the address of your server at, which is Your mail for * is delivered at

Change the MX record for then your problem will be solved (if your postfix configuration is correct).

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Definitely DNS, your MX is set to This is a server farm wich adsresses in the address range. Fix your MX. – BillThor Sep 6 '10 at 21:44
Fixing my MX record fixed it. Thank you! – Jason Swett Sep 8 '10 at 16:10
You're welcome! – Karst Lok Sep 8 '10 at 18:49

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