I see, is there a way to like for example set up listserv so it's send the first 500k for example and wait for 10-15 to send the other 500k. And about the Big Boy anyone have tips or resource to share with me on best pratice to send a lot of email to msn,aol,yahoo and so on without getting in they spam filter. Remember that I'm using these numbers for a worst case scenario there, I don't think they will send millions of email per day. So if I send a millions of email and 500k bounced listserv should not have resource issues or performance issue? By the way the machine that list is on is a P4 3.2 ghz with 1 gigs of ram running on windows server 2003. -----Original Message----- From: LISTSERV site administrators' forum [mailto:[log in to unmask]] On Behalf Of Valdis Kletnieks Sent: Wednesday, March 29, 2006 11:52 AM To: [log in to unmask] Subject: Re: Bounced Email On Wed, 29 Mar 2006 10:17:01 -0400, Bruno Robichaud said: > Hey, The reason I wanted to use my own system to process the Bounced is I > didn't want to put to much charge on the listserv box, I mean it's sending > email + handling bounced by creating chanlog text file with the bounced in > it. Does it affect listserv performance to let listserv handle the bounced > like if I send 1 millions of email and a lot of these address bounce would > it take too much resource from listserv? I don't want it to die from > exhaustion :P If you're sending 1 million e-mails, the problem is *not* in handling the bounces (at least after the first time - expect a *lot* of bounces until you wash the database). Your biggest bottleneck will almost certainly be trying to make the first delivery attempt to all the destination systems in a reasonable amount of time, especially if management has decided on some very unreasonable definition of reasonable. ;) Remember - if you have a million addresses, you'll probably find that half of them are at 'the big boys' - and you'll have to worry about how to send that many mails to AOL, Yahoo, MSN, and places like that without ending up in their spam filters. That will leave you 500K or so users that will be scattered across 100K different little mailservers....