Kirk Friggstad wrote: >Hey all: > >We've recently installed a Barracuda (rack-mount "spam firewall" based on >Spam Assassin, also does virus scanning) on our network in front of our >XMail system, and pointed our MX records to deliver mail to the Barracuda >instead of directly to our server. This change was made over a month ago, >but we still find some spammers and viruses (especially W32/Zafi.B) are >delivering directly to our XMail server instead of following the MX records >to the Barracuda. The mail server is not at the same IP address as our >default @ record for the domain, but it does have A records for "mail" and >"smtp". > >First question: has anyone seen behavior like this before (bypassing MX >records)? > >Second question: is there any way to configure XMail to block any >unauthenticated request from untrusted IP addresses (not in SMTPRELAY.TAB), >but still allow mail from the Barracuda to come in (obviously the Barracuda >is in SMTPRELAY.TAB) and allow our users to relay with authentication? > >Thanks in advance for any advice and/or insights! > >Kirk > > > > You could probably make a simple pre-data smtp message filter that just rejects the message if the user is not authenticated.
-John - To unsubscribe from this list: send the line "unsubscribe xmail" in the body of a message to [EMAIL PROTECTED] For general help: send the line "help" in the body of a message to [EMAIL PROTECTED]
