[Modus] OT Blocking mail servers at the router

[Mike McTee]

This is an Off Topic post.   I seem to recall some discussion here regarding blocking customer’s from being able to operate mail servers on the network by setting access list (or something) at the router level.  I’ve searched through the past e-mails and can’t seem to find this information.  If anyone is doing this or knows what the specifics are, please e-mail me off-list.   I’ve received a few complaints of spam being sent from within our network and upon verifying the IP Address, it shows to be an IP Address used by dialup customers.  I’m thinking these are likely customers who have SMTP services running and are unaware of it (W2k/XP).   Thanks in advance.   Sincerely, Mike McTee Internet Systems Technician Eastex Net (www.eastex.net)