> Hello!
>
> One of our list owners has problems to receive messages from our
> server. He can add and remove people without any problems but
> as soon as he tries to review a list he faces challenges.
>
> He receives a message that states - File "XXX LIST" has been mailed
> to you under separate cover.
>
> But he never receives this separate message. I have checked the log
> file and the file was sent to him normally.
>
> Do you know what might cause this kind of challenge for him?

His ISP is refusing mail with Null returns paths. see our FAQ:
http://www.lsoft.com/manuals/lsv-faq.stm#5.16

He can either attempt to convince them to become RFC complaint or seek
another ISP, which is exactly what I would tell them.

--
John Lyon
L-Soft international, Inc.
http://www.lsoft.com