You can use SPF to just check. But it would work best when you do both. Otherwise if nobody implemented, nobody would have anything to check against - catch 22.
By implementing you also protect your own domain(s) from being spoofed (providing the recipient checks against SPF). The more publicity SPF gets and the more IT bods that implement it, the better everything will get (in my opinion). -----Original Message----- From: John Carter [mailto:[EMAIL PROTECTED] Sent: 11 March 2004 18:28 To: [EMAIL PROTECTED] Subject: RE: [Declude.JunkMail] SPF Forgive the ignorance. To use the SPF test, do we have to have implemented SPF ourselves or can it be used to check against those who have? Thanks, John --- For those that are interested, we now have an interim release with SPF support in it. [interim information removed] To use the new SPF test, you can add lines such as: SPFPASS spf pass x -5 0 SPFFAIL spf fail x 8 0 to your global.cfg file. SPF returns "PASS" for E-mail that passes SPF (that comes from an IP that is acceptable to the owner of the domani that it claims to be coming from), "FAIL" for E-mail that fails SPF (that does not come from an acceptable IP for the domain), or "UNKNOWN" (for E-mail from domains that do not use SPF yet, or for some other reason should return UNKNOWN). This will help reduce false positives (for domains that have SPF support), and help capture more spam (as spam comes in from domains that have SPF support, but the spammer isn't using an acceptable IP). --- -Scott --- [This E-mail was scanned for viruses by Declude Virus (http://www.declude.com)] --- This E-mail came from the Declude.JunkMail mailing list. To unsubscribe, just send an E-mail to [EMAIL PROTECTED], and type "unsubscribe Declude.JunkMail". The archives can be found at http://www.mail-archive.com. ************************************************ Email checked by UKsubnet anti-virus service To prevent email abuse & block spam contact [EMAIL PROTECTED] Tel: +44(0)8712360301 Web: www.uksubnet.net Fax: +44(0)8712360300 Powered by UKsubnet Internet Service Provider Business to Business Internet (ISP) ************************************************ ************************************************ Email checked by UKsubnet anti-virus service To prevent email abuse & block spam contact [EMAIL PROTECTED] Tel: +44(0)8712360301 Web: www.uksubnet.net Fax: +44(0)8712360300 Powered by UKsubnet Internet Service Provider Business to Business Internet (ISP) ************************************************ --- [This E-mail was scanned for viruses by Declude Virus (http://www.declude.com)] --- This E-mail came from the Declude.JunkMail mailing list. To unsubscribe, just send an E-mail to [EMAIL PROTECTED], and type "unsubscribe Declude.JunkMail". The archives can be found at http://www.mail-archive.com.
