Configure the list to use passive probes with a probe interval of 1 day.
This will cause the first message of the day, every day (or maybe every
other day), to be sent as a passive probe for all subscribers who are
not set to NOMAIL. The recipient's email address will be embedded in the
envelope-sender address. When the message loops back, you should be able
to identify the offender.

For additional information on passive probes, see:
	http://www.lsoft.com/manuals/15.0/listkeyw.html#keyError

--
Paul Russell, Senior Systems Administrator
OIT Messaging Services Team
University of Notre Dame
[log in to unmask]


On 7/11/2007 09:13, Stephen C. Nill wrote:
> Pete, sorry that I didn't mention that I already searched for addresses
> from these domains (using various wildcard combinations to make sure).
>
> At 03:46 AM 7/11/2007, you wrote:
>> check for subscribers from:
>>
>> [Declude.]Interceptor.com
>> nozonenet.com
>>
>>
>> At 00:50 7/11/2007 Wednesday, Stephen C. Nill wrote:
>> >Colleagues,
>> >
>> >I have a pesky problem that maybe a set of fresher eyes can help me
>> with. When posting to one of our lists, the posting makes it to the
>> list just fine, but the following is sent back to the sender:
>>
>>
>>
>> >>Return-Path: <[log in to unmask]>
>> >>Received: from Declude.Interceptor.com (68.208-100-26.nozonenet.com)
>> by charitychannel.com (LSMTP for Windows NT v1.1b) with SMTP id
>> <[log in to unmask]>; Tue, 10 Jul 2007 21:44:37 -0700
>> >>Return-Path: <[log in to unmask]>
>> >>Received: from charitychannel.com ([216.132.135.170])
>> >>        by Declude.Interceptor.com
>> >>        with hMailServer ; Tue, 10 Jul 2007 23:43:47 -0500
>
>
>
> Stephen C. Nill
> Founder & Chief Executive Officer
> CharityChannel
> [log in to unmask]
>