SMTP Error from my server?

[Chris Maness]

Chris Maness wrote:
> Jay Chandler wrote:
>> Chris Maness wrote:
>>> I have not seen this error before.  What does it mean?  (I will 
>>> change the actual e-mail to protect the address from spam bots).
>>>
>>> To: NOSPAMtim at adelphia.net
>>>> From: Mail Administrator <Postmaster@<PostmasterDomain>>
>>>> Subject: Mail System Error - Returned Mail
>>>> Date: Mon, 17 Sep 2007 14:48:17 -0400
>>>>
>>>> This Message was undeliverable due to the following reason:
>>>>
>>>> Your message was not delivered because the return address was refused.
>>>>
>>>> The return address was "<NOSPAMtim at adelphia.net>"
>>>>
>>>> Please reply to Postmaster@<PostmasterDomain>
>>>> if you feel this message to be in error.
>>>
>>> Chris Maness
>>> Sys Admin
>>
>> Looks to me like a failed sender verification callout-- these are 
>> generally construed to be abusive.  I can't easily tell from your 
>> munging whether it's your server or Adelphia that's doing it, though.
>>
> This is the only e-mail address that I am having this problem with, 
> and it has been going on for a year or so now.  What other info would 
> you guys need to tell what it is.  I guess I don't understand the 
> whole "sender verification callout"  I'll have to do a little google 
> to find out.
>
> Thanks,
> Chris Maness
> Sys Admin for a couple of tiny domains.
>
p.s.  I read up on this and I believe this would be a problem on the 
sender side.  Is the something like an access file that I can change to 
just allow this particular sender without the check?

Chris Maness