One of the things I've done in the spam war is to use something called ASSP, which is just Anti Spam SMTP Proxy.
It does a passable job of prevening inbound spam, and it prevents anyone not on my network from sending mail out through my server, via firewall rules put on the server. You can use a similar setup to have your customer's emails filtered outbound through something like this. It can also be placed on alternate ports and using firewall rules, prevent any cust omer from sending mail directly out. I haven't needed to do that, at least not yet. ASSP, when run on the mail server machine itself, can also act as an authentication and filtering of outbound emails. ++++++++++++++++++++++++++++++++ <insert witty tagline here> ----- Original Message ----- From: "Marlon K. Schafer" <o...@odessaoffice.com> To: "WISPA General List" <wireless@wispa.org> Sent: Friday, June 26, 2009 8:33 AM Subject: [WISPA] OT, pesky email stuff > Hi All, > > What are you guys doing for email these days? I LOVE my setup for it's > reliability, ease of use etc. > > Hacked customer accounts and virus's are killing me though. We don't > catch > things until 100,000s of messages go out and we get black listed. This > has > now happened 3 or 4 times in the last couple of years. > > My server admins aren't coming up with a solution to this other than to > limit cc's to 25 per message. We did that once before and my phone rang > off > the hook because people can't send jokes to their friends..... > > The other thing that makes it hard is that the log files that I get (up to > 40 megs per day!) don't list the authenticated sender, only the reply > address. So I see tens of thousands of messages from a user that's not > even > mine (faked info). sigh > > We use Courier MTA. > > My thought is to set the server to allow a max of 1000 messages per day > per > user. And to somehow make the log file ONLY send me the number of > messages > received per a user, and the number sent, user name and ip addy of all > those > sending. Twice now I've asked about that idea and gotten no response from > the server admins. > > Suggestions? > > laters, > marlon > > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > -------------------------------------------------------------------------------- > > WISPA Wireless List: wireless@wispa.org > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: wireless@wispa.org Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
