* on the Mon, Dec 18, 2006 at 04:56:05PM -0000, Gordon McKee wrote:
> I have an exim front end server and an exchange backend server. All seems
> fine except that I can't send emails to users on 123-reg's server. all
> messages come back as:
>
> gordonmckee@???
>
> SMTP error from remote mail server after RCPT
> TO:<gordonmckee@???>:
>
> host mx0.123-reg.co.uk [195.224.48.120]: 550-Verification failed for
> <gordonmckee@???>
>
> 550 Sender verify failed
There's nothing there to suggest 123-reg's mx's are doing callouts. It
might be failing because the MX records for optimalprofit.com are:
