One connection per 5 minutes is extremely low.
There are mailing list products that send to 1 recipient per message and close the connection after each one. They don't pipeline when running a queue either. I think the products run their own queue instead of handing it off to a sane MTA. I don't know the product names but we've been on the receiving end of them. We've currently got default ClientRate: 20 and ClientConn: 10 as a compromise (20 per second, 10 at a time). This is on systems fielding about 200,000 messages a day. Constant Contact regularly hits even that ClientRate limit. A few spam sources hit it each day too. Joseph Brennan Columbia University Information Technology _______________________________________________ NOTE: If there is a disclaimer or other legal boilerplate in the above message, it is NULL AND VOID. You may ignore it. Visit http://www.mimedefang.org and http://www.roaringpenguin.com MIMEDefang mailing list [email protected] http://lists.roaringpenguin.com/mailman/listinfo/mimedefang
