You may want to look into products that support SMTP authentication to send mail to remote hosts. Of course that wouldn't protect any of your users from getting SPAM and stuff.
I've been looking into various products that support SMTP authentication and have several friends that use Exim (http://www.exim.org). I haven't used Lotus Notes/Mail in so long I can't remember what security functionality it has. One last method is called 'POP before SMTP' where the user would POP with their password which would be seen by the SMTP service allowing the user to relay. I haven't read a lot on this one because I didn't like the idea of the user getting errors sending SMTP mail prior to sending a POP request. Anyway, there are solutions out there. I'd recommend looking into Exim as a good start. David Ishmael Sr. Engineer - Windward Consulting -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] On Behalf Of Navin Mehra/MUM/IN/STTL Sent: Sunday, March 24, 2002 11:56 PM To: [EMAIL PROTECTED] Subject: Restrict telnet to port 25 via firewall. Hi, I have a Lotus Notes mail server behind my Pix firewall 5.3(1), the problem is anyone from outside is able to telnet my smtp port 25 and compose a mail and send it. The issue is though my mail server restricts free relay he/she can compose a mail via telnet to port 25 in name of anyone else in the same domain and send a false mail on his behalf. So is there anyway where by I can block the telnet to port 25 and thereby stop the composition of a mail. Is there a way to authorise/restrict access the telnet to service ports. Requesting assistance Regards Navin Mehra Softcell Technologies Ph. 460 6969 Extn. 220 _______________________________________________ Firewalls mailing list [EMAIL PROTECTED] http://lists.gnac.net/mailman/listinfo/firewalls _______________________________________________ Firewalls mailing list [EMAIL PROTECTED] http://lists.gnac.net/mailman/listinfo/firewalls
