I will chime in here now... We had a Cuda 800 ordered to take over for our overloaded 400 unit. And with Len's help we placed 2 MX Gateways running his IMGate software and dropped the load from over 400k messages a day on the cuda to under 100k instantly. IMGate is a great solution to have in front of any machine, whether it be IMail itself or another spam filtering product. By doing greylisting and verifying valid recipients, it cuts most of the load off the other system. Grant Griffith Enhanced Telecommunication
________________________________ From: [EMAIL PROTECTED] on behalf of Len Conrad Sent: Tue 10/9/2007 3:35 PM To: [email protected] Subject: RE: [IMail Forum] OT: Barracuda 200/400 >It does sound like IMGate is great, but I don't want to learn >another OS and I love the flexibility if giving users the ability to >handle their own filters and quarantine with the Barracuda. As I said, if you go Barracuda, you can go with a cheaper box and cheaper subscription, saving yourself many $1000 over the years of subscription. IMGate/MX is best place for rejecting bad recipients (takes a huge load off the BC AND the mailbox server, because BC queries the mailbox server for every recipient, passing DoS and JoeJobs straight through to the mailbox server. 100K bad recipients? BC send 50K queries to Imail.) IMGate accepts the exported list of recipients from the mailbox server, rejects bad recipients, taking that load off BC and the Imail server. IMGate Advanced now has weighted rejected at the envelope level (before DATA command) so you can score based on 1. IP: no PTR PTR domain name regex matches for subscriber access networks, etc RBL hits 1. helo: no helo illegal characters non-fully-qualified, not in DNS regex string matches for subscriber access networks, etc 2. from: null sender regex string matching >And If things get really busy, I drop another one in and do some clustering. I have scheme for load distribution where the load is split +/- 2% between any number of boxes behind IMGate (eg, Barracuda or Imail). The load distribution also works for spreading outbound load over 2 or more gateways. All of the above happens before DATA, so it's extremely efficient. Then all the other features of IMGate advanced like sender verification, greylisting, bad recipient rejection, great logging, free anti-virus, etc. Len To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
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