>> They send out a little over 100,000 emails a month.

As much as that may sound, it's not a lot of email.  Just about any SMTP
server can handle that volume.  The real trick is timing.  If all 100K go
out at once then you will need to throttle the output not because of server
load but because the receiving servers, in particular AOL, Earthlink and
Hotmail will start rejecting email if you try to deliver too much too fast
(as determined by them).

Having a separate sending SMTP server for broadcasts is in my opinion the
best way because you can throttle the delivery on that server without
effecting your normal email server and burdening the queue.  Just be sure
the sending email server has proper PTR (RDNS) and SPF records or a Domain
Key, if you use them, and then play with the outbound sending threads to
find the optimum delivery speed.


Dennis Powers
UXB Internet - A website Design and Hosting Company
P.O. Box 6028, Wolcott, CT 06716 - T:203-879-2844
W: http://www.uxbinternet.com
W: http://www.ctbusinesslist.com




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