Re: [IMail Forum] Prevent spammers from bypassing my MX records

[E. Shanbrom \(Ipswitch\)]

once you have 8.2 installed you can have your router redirect and traffic for port 25 of the IMAIL IP to port 587. You can then set the IMail SMTP service to listen on a port other than 25 (2525 for instance) and have the MX machine send to that port for non-Authenticated traffic   Eric S ----- Original Message ----- From: Andy Paluch To: IMail_Forum@list.ipswitch.com Sent: Wednesday, April 06, 2005 2:03 PM Subject: [IMail Forum] Prevent spammers from bypassing my MX records Using 2 external boxes to filter spam and both MX's point to them. Some spammer is sending emails directly to my IMail box customers and bypassing the MX records when sending mail. I leave port 25 open because my customers (using SMTP AUTH) use the Imail server for outgoing mail.   I notice that version 8.2 of Imail will have an auth only port of 587. That's great to prevent relaying, but will it allow mail NOT to be sent to my local users?   How do I stop this short of having ALL customers change their outgoing mail port to 587 and me blocking port 25 at the Firewall?   Thanks! Andy