yes, and so was xtra for a long time (i think mainly because they had their smtp servers in the same netblock as their dialup users, and of course there will always be a percentage of dialup users who are spammers or who have open relays.)
there is a chch produced commercial package for windows that downloads the mail headers from a pop box. you then scan for spam (most of it is prettty obvious from the subject and sender) and kill them on the server without ever downloading the whole message. no doubt time consuming. no doubt realtively trivial to write a linux equivalent script if you understand the pop protocol (relativley simple) and are competent in scripting (ie not me). In fact someone has probably done it. if you are looking for a solution for your own smtp server you could try spamassassin, although the spammers seem to constantly come up with new schemes to sidestep the algorithms, especially as the algorithms are open sourced :-) again having a spam swallowing isp is all very well if all you want is a pop box, or a few pop boxes, but if you run your own mail domain your isp's spam scanner will not touch it. one of the most effective, but most annoying methods is challenge response, ie the first time you email a person you get an automated mail back saying "if you genuinely want to contact [EMAIL PROTECTED] reply to this message, you have 24 hours" as most spammers have faked sender/replyto fields in their headers, their mail never gets through. pita for genuine senders though. On Mon, 19 Jan 2004 12:27:22 +1300 Paul William <[EMAIL PROTECTED]> wrote: > didn't someone on the list report that paradise was blacklisted on one > of these lists? > > On Mon, 2004-01-19 at 12:14, David Taylor wrote: > > They are called Blacklists and are lists of IPs that send out spam. They > > often cause problems when a legitimate sender is behind a blacklisted ISP. > > Use them with extreme caution. > > Ciao, Dave > > > > -----Original Message----- > > From: Julian Visch [mailto:[EMAIL PROTECTED] > > Sent: Monday, 19 January 2004 11:02 a.m. > > To: [EMAIL PROTECTED] > > Subject: Mailtool to block spam? > > > > I am trying to block spam so that I don't have to download the whole spam > > first, is there any tool to do that? > > > > thanks > -- > > .''`. Paul William > : :' : Debian admin and user > `. `'` > `- Debian - when you have better things to do than fixing a system > <h1><b><a href="http://www.debian.org";>debian.org</a></b><h1> > -- Nick Rout <[EMAIL PROTECTED]>
