Grant, We have a Barracuda 300, and we handle this by passing off all email through the cuda before it reaches the users' mailboxes. We have 3 email servers, with only one hosting email accounts, and all three are at least dual homed. 1 interface on each goes to the WAN, and another connects to a separate, private LAN. The cuda is also only on the private LAN. The backup mail servers route all incoming mail through the private LAN to the cuda, where it's filtered or handed off to the primary server and delivered to users. If mail is sent from the Internet directly to the primary server, a port redirector on that server redirects the traffic to cuda on the private LAN, which in turn processes for spam and then passes back off to the primary server via a different port number.
It sounds a bit confusing, but it works like a charm for us. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Grant Griffith - IMail Sent: Thursday, June 22, 2006 8:47 AM To: [email protected] Subject: [IMail Forum] Junk Mail Bypassing Filtering Hello All, We are currently using a Barracuda Spam Firewall 400 and are having more and more junk mails somehow ignoring that our MX points to that firewall and then they send directly to our Imail server along with a Exchange server we are running. Has anyone found a way to stop this? We thought about either changing the port or blocking anything coming from anywhere other than the Barracuda. However that will force us to have to tell everyone to change their outlook settings to use port 587 to send mail and that would be a huge headache. Thanks, Grant Griffith Web Application Developer Enhanced Telecommunications Corp. (812)932-1000 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/ 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/
