I think this: http://spf.pobox.com/faq.html#churn explains it well.
It certainly complicates spamming... and that can't be a bad thing. -John Michael Luke wrote: >Mike Harrington wrote: > > >>Hey guys, just read these articles about spammers using SPF. Thought >>you might find them interesting as well: >>=20 >> >> >> >http://news.com.com/Study%3A+Spammers+use+e-mail+ID+to+gain+legitimacy/2 >100-1029_3-5357269.html?tag=3Dnefd.top > > >>=20 >>and >>=20 >>http://www.mxlogic.com/news_events/09_08_04.html >>=20 >>- >>To unsubscribe from this list: send the line "unsubscribe xmail" in >>the body of a message to [EMAIL PROTECTED] >>For general help: send the line "help" in the body of a message to >>[EMAIL PROTECTED] >>=20 >>=20 >>--- >>Incoming mail is certified Virus Free. >>Checked by AVG anti-virus system (http://www.grisoft.com). >>Version: 6.0.756 / Virus Database: 506 - Release Date: 08/09/2004 >> >> > >It's hardly fair to criticise SPF for failing to do something it was >never designed to do. SPF is designed to prevent phishing and spoofing >and it seems to do a good job of that.=20 > >Besides, if spammers are openly advertising which domain they are >sending from, it should be much easier to blacklist them or prosecute if >they're breaking laws (yeah I know that's wishful thinking but you never >know). > >Give it a chance. > >--=20 >Michael Luke > >- >To unsubscribe from this list: send the line "unsubscribe xmail" in >the body of a message to [EMAIL PROTECTED] >For general help: send the line "help" in the body of a message to >[EMAIL PROTECTED] > > > > - To unsubscribe from this list: send the line "unsubscribe xmail" in the body of a message to [EMAIL PROTECTED] For general help: send the line "help" in the body of a message to [EMAIL PROTECTED]
