Mark Weaver wrote: > > Hi List, > > I've been thinking about something for a little while now and I was wondering if >anyone here on the list has Postfix installed and doing reverse lookups as a method >of controling the amount of SPAM coming into their mailservers.
Yes. There are problems though in that I have to allow certain hosts to send me mail regardless because some legit sites either don't have a reverse mapping, or have it wrong... It appears that Mandrake may have fixed their DNS entries so that 216.71.84.35 returns only mandrakesoft.mandrakesoft.com instead of 3 hostnames of which only one was mapped back. This was causing postfix to reject about 2/3's of the messages sent to me. Even with this feature enabled, I find that some spam is still getting through because the intermediate hosts can be reverse looked up. I have to add these spammers to my "header_checks" file... I plan to have a look at http://www.spambouncer.org for other options. I have also enabled "recipient_delimiter = +" and am changing my IDs at the various sites I use to clearly identify which sites are either selling or leaking my address... HTH, Pierre
Want to buy your Pack or Services from MandrakeSoft? Go to http://www.mandrakestore.com
