On 06/25/2010 02:56 PM, Greg Woods wrote: > On Fri, 2010-06-25 at 14:46 -0700, Daniel B. Thurman wrote: > >> I thought it was sufficient to look into the headers >> of the offending email spammmers and add these respective >> IP address and/or host names to the /etc/mail/access file, >> > > Attempting to block the sender addresses will never work because they > can so easily be forged. Attempting to block IP addresses of spammers by > hand will not work either. Spammers these days use botnets, networks of > thousands of compromised boxes, so that their IP addresses change > rapidly. By the time you discover and enter one of their IP's, they've > already moved on to another one. > Yes, that makes sense... > What you need is a DNS-based block list which is maintained by people > who are dedicated to keeping it up to date. This isn't perfect either > but the reaction is far faster than you can ever do yourself. I use the > Spamhaus XBL/SBL (www.spamhaus.org) for this both at work and at home; > it catches 10 times more spams than our SpamAssassin-based content > filters do. > > --Greg > Are you talking about something like this from sendmail.mc: FEATURE(`dnsbl', `relays.ordb.org', `"Rejected due to Open Relay see http://www.ordb.org/lookup/?host="; $&{clientaddr} " for more information"')dnl -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
