Other than allowing sending of mail only from a certain IP addresses and/or username/password authentication, there is nothing else you can do (that I have heard of).
The alternative is having an open relay. Even if the relay is not marked open, a user can send email if they know a user on the system like using 'help@', 'info@', 'root@', etc. With authentication they need to know the username and their password to send. With IP level security the sender must originate from the specified IP range. A combination of using ESMTP and a port change is better. A combination of using ESMTP, port change and a virtual IP (sorry... said firewall before and I meant our load balancing appliance) is even better yet. Matt -----Original Message----- From: Greg Silver [mailto:[EMAIL PROTECTED]] Sent: Wednesday, February 06, 2002 3:44 PM To: inFusion Support List Subject: RE: [iMS] OPEN RELAY with ORBZ otherwise do what? -----Original Message----- From: Howie Hamlin [mailto:[EMAIL PROTECTED]] Sent: Wednesday, February 06, 2002 4:43 PM To: inFusion Support List Subject: Re: [iMS] OPEN RELAY with ORBZ Yes, authenticated SMTP is the way to go if you can get your users to use it. Howie ----- Original Message ----- From: "Matthew Boyce" <[EMAIL PROTECTED]> To: "inFusion Support List" <[EMAIL PROTECTED]> Sent: Wednesday, February 06, 2002 4:39 PM Subject: RE: [iMS] OPEN RELAY with ORBZ > Do you use ESMTP with authenication to send email? > > We use our firewall to set a virtual IP for the SMTP server and switched the > port # and use ESMTP Authentication. > > Matt Boyce > > ==^======================================================= This list server is Powered by iMS "The Swiss Army Knife of Mail Servers" -------------------------------------- To leave this list please complete the form at http://www.coolfusion.com/iMSSupport.cfm Need an iMS Developer license? Sign up for a free license here: http://www.coolfusion.com/iMSDevelopers.cfm List archives: http://www.mail-archive.com/infusion-email%40eoscape.com/ Note: You are subscribed as [email protected] ==^=======================================================
