help a lesser figure out mail servers

justn

New Member
So, I'm new to the whole vps hosting but i've got my domain going. The only problem I've got is the email. This is the first time I've set up a *nix mail system. I'm just wondering if someone could help me out a bit with a few questions i'm having.
On outgoing mail, the domain reported is [email protected] I'd like to have that just be [email protected], how do i go about accomplishing this?
Also, emails to addresses at aol.com seem to be bouncing with this error:

The original message was received at Mon, 29 Oct 2007 10:42:52 -0400
from host.modern-radio.com [127.0.0.1]

----- The following addresses had permanent fatal errors -----
<[email protected]>
(reason: 550 REQUESTED ACTION NOT TAKEN: DNS FAILURE)

----- Transcript of session follows -----
... while talking to mailin-01.mx.aol.com.:
>>> MAIL From:<[email protected]>
<<< 550 REQUESTED ACTION NOT TAKEN: DNS FAILURE
554 5.0.0 Service unavailable


Any help would be GREATLY appreciated. I know my way around linux just fine, i'm just a little green when it comes to this mail server stuff.
Justin
 
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