> > Server does support. I have send emails using same distribution list
> > through Comcast webmail. I never had a problem until recently. The
[quoted text clipped - 6 lines]
> SMTP client are completely unrelated and the former working has nothing to
> do with the latter.
> Comcast is telling me it is not a problem with their server. They
> have suggested splitting dl, or firewall problem. Splitting list in
> two did not work. No changes have been made to my system so I don't
> believe it is a firewall suggestion. Do you have any other
> suggestion? Your help would be greatly appreciated.
What I would do it enable diagnostic logging and if it contains evidence
that the server accepted the message, I would show it in their face as proof
they have a problem and they won't be able to argue with it.

Signature
Brian Tillman [MVP-Outlook]
dotomuchmom - 30 Aug 2007 04:48 GMT
> > Comcast is telling me it is not a problem with their server. They
> > have suggested splitting dl, or firewall problem. Splitting list in
[quoted text clipped - 5 lines]
> that the server accepted the message, I would show it in their face as proof
> they have a problem and they won't be able to argue with it.
Brian Tillman - 30 Aug 2007 14:56 GMT
> I hate to be a pain but how exactly do I enable diagnostic logging?
Check the Microsoft Knowledgebase:
"How to turn on the Enable Mail Logging option for troubleshooting in
Outlook 2003 and Outlook 2007 "
http://support.microsoft.com/kb/831053/en-us

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Brian Tillman [MVP-Outlook]