"patrick keshishian" <[EMAIL PROTECTED]> writes: > When you speak of "misconfigured mail servers bouncing spam", > what exactly is a "proper configured mail server" supposed to > do with spam directed at non-existing user @their-host-name?
The real question in there is, what does a properly configured mail server do with spam? My answer is, if it gets as far as content filtering, drop it as soon as it's classified as spam, don't bounce it. Bouncing spam is never useful, the purported return address is extremely unlikely to be deliverable. A bounce is only useful for valid messages (which happen to be sent to a mistyped address), which in our context means that the message has passed greylisting and most likely some content filtering or other. In all likelihood you will still bounce to a few bogus ones, but taking this approach makes you a lot less noisy. The noise you are seeing is from sites which either don't bother much with filtering, or if they do, belong to that little cult of "bouncing spam is good" believers. > - GREY list count is 342 (and growing) > - unique bogus email count is 341 > - ESTABLISHED spamd connection count is 63 (and growing) Unless your spamd box is extremely skinny, none of these figures are particularly worrying. spamd allocates IIRC about 12 kilobytes of buffers per tarpitted host, for greylist entries just another tuple in the database. My list of trap addresses, all harvested from stuff from out there, is just over 2700. Right now there are 273 hosts in the greylist at the gateway closest to where I'm sitting (my home net, actually), with 533 in TRAPPED state. > This is not fun :-\ Well, it should not be a huge problem. IMO people who fake addresses in other people's domains should be prosecuted for some variety of fraud, but with the current level of digital competence in law enforcement that is just not going to happen. In the meantime we have reasonable countermeasures. See what greyscanner can do for you. - P -- Peter N. M. Hansteen, member of the first RFC 1149 implementation team http://bsdly.blogspot.com/ http://www.datadok.no/ http://www.nuug.no/ "Remember to set the evil bit on all malicious network traffic" delilah spamd[29949]: 85.152.224.147: disconnected after 42673 seconds.
