Re: [courier-users] SPF support for Courier

[Dennis Sacks]

Julian Mehnle wrote: Chris Petersen [[EMAIL PROTECTED]] wrote: There is already an SPF module for pythonfilter. Unfortunately, I had to disable it because so many web services out there insist on sending things like invites and referrals "from" my address rather than "from" them and "reply-to" to me. SPF will only be effective if people start using the From header correctly. SPF isn't meant to be applied to message headers ("From:", "Sender:", whatever), but to the envelope sender address that's specified by the sender through the "MAIL FROM" command during the SMTP dialog. Brainstorming here: so if there is an SPF record, you can verify the validity of the 'sending' server and accept or reject accordingly. If not, why not fall back on greylisting? (http://projects.puremagic.com/greylisting/index.html) Dennis