On Friday, November 3, 2006, 09:23:35, Will wrote: > I have recently installed a barracuda spam firewall. my imail server is > mail.ncats.net 199.176.228.5 and my barracuda server is smtp.ncats.net > 199.176.228.9. I have already changed my mx record to point to > smtp.ncats.net. > > I would like to block direct incoming mail that is not authenticated or > on my network. I still have users that relay using mail.ncats.net, but > I do not want to accept incoming mail from anywhere else. Basically, I > want my users to be able to use may smtp server, but force everyone else > to go through my barracuda. My fear is that spam could still be > directed to my mail server if it ignores my mx record.
Block all access to mail.ncats.net port 25 on except from smtp.ncats.net and any internal hosts you want to allow. Allow access to mail.ncats.net port 587 from anywhere and require authentication. Tell your external users they have to configure their MUA to connect to mail.ncats.net port 587 with authentication required. -- [EMAIL PROTECTED] "The avalanche has already started, it is too Rod Dorman late for the pebbles to vote." - Ambassador Kosh 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/
