[rt-users] Sendmail - Sender address rejected: Domain not found

[Kevin Falcone]

On Fri, Feb 10, 2012 at 02:04:17AM +0530, Yaj Tap wrote:
>    Can anyone help with this?
> 
>    We are getting <apache at rt.domain.com>: Sender address rejected: Domain not found error

As I replied earlier:

>    > Check that 02.domain.com is actually a valid domain outside your
>    > firewall. Since you're obfuscating, we can't check for you.
>    >
>    > Your error message says that relay-ex2.cch.ca believes that
>    > apache at rt.domain.com is invalid.

You're sending mail from an invalid domain and something is rejecting
it.  You'll need to ensure that your DNS is visible to the server
accepting email.

-kevin
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