<quote who="dman"> > On Fri, May 03, 2002 at 11:09:53AM -0400, CertaintyTech - Ed Henderson > wrote: | This question is not SA specific but just a general email > sysadmin type | question: What is an effective way to monitor my own > dialup customers to | see if any are abusing their email privilege by > sending out spam? I am | using qmail. Somehow monitor the volume that > each local IP is sending? Just | curious to see what others are using > and how you do it. > > First block outgoing connections to port 25. Your customers shouldn't > have their own mailserver, they should be using your smarhost relay.
Meany people using dialup have email accounts for their work/profession. Requiring them to send "on the road" email through your own server rather than their work server is a pain in the ass for your customer. It requires multiple settings for SMTP servers and generally makes their lives MUCH harder. Just because someone is using dialup doesn't mean they don't have other means of accessing the web besides that connection, and that those other means are just as valid -- perhaps more so -- than your server. > It may (or may not) be a > good idea to verify that the sender address (MAIL FROM:) matches their > account with you. Horrible horrible idea. Unless your server is a corporate server this should never ever ever be done. It's simply -=rude=- Really what this boils down to is punishing your users for others actions. Assuming that every dailup user is a spammer is simply not fair to 99.99% of your users. -- You are responsible for your rose. _______________________________________________________________ Have big pipes? SourceForge.net is looking for download mirrors. We supply the hardware. You get the recognition. Email Us: [EMAIL PROTECTED] _______________________________________________ Spamassassin-talk mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/spamassassin-talk
