smtp to multiple recipients in one remote domain

[oldyeller]

Hello-

My client is a religious organization who frequently sends email bcc'd to large groups of congregants, and a lot of them are at comcast.net. Exchange 2007 makes one SMTP connection to Comcast's email servers and sends one
message with 250+ recipients. Comcast doesn't seem to like this many recipients and drops the SMTP connection.

I have no way to test on Exchange 2003, but I believe the behavior there was to make 250+ individual SMTP connections and send one copy of the message on each. Whatever 2003 did, it worked fine for this customer before their recent
upgrade to 2007.

I cannot figure out any way to make these messages go through, such as a way to force the SMTP connector to send 5 copies of the message with 50 users each.

Any ideas?

Yeller

 

[Davetoo]

The first link help at all?

http://www.google.com/search?hl=en&...umber+of+recipients+exchange+2007&btnG=Search

I'm Certifiable, not cert-ified.
It just means my answers are from experience, not a book.

There are no more PDC's! There are DC's with FSMO roles!

 

[58sniper]

If they are bcc'd, that's an individual message going out for each recipient.

Pat Richard MVP
Plan for performance, and capacity takes care of itself. Plan for capacity, and suffer poor performance.

http://www.ucblogs.net/blogs/exchange/