On Fri, Mar 18, 2011 at 1:13 PM, Reindl Harald <h.rei...@thelounge.net> wrote: > > Am 18.03.2011 12:54, schrieb Alain Spineux: >> On Fri, Mar 18, 2011 at 12:22 PM, Reindl Harald <h.rei...@thelounge.net> >> wrote: >>> >>> >>> Am 18.03.2011 12:18, schrieb Alain Spineux: >>> >>>> and RBL providers handle domain names instead of IP addresses. >>> >>> what sense should this make? >>> >>> the domain / rcpt / from does mean NOTHING >> >> SPF can be used on domains of the SMTP <MAIL FROM:> and header <FROM:> >> fields and be linked to the IP address this way. > > they can not,
Why ? When a RBL provider get SPAM from a valid SPF enable domain, he log the domain instead of the IP address. And when you get an email, if it is not from a SPF enable domain you drop it, else you SPF check both domain of SMTP <MAIL FROM: > and header <FROM:> field with the RBL and reject if it does't match the SPF pointer. To handle mailing list properly, for example this mailing list, the RBL should allow mail from 168.100.1.3 and sender=owner-postfix-us...@postfix.org to fake the FROM: header to show the real mail sender. Any mailing list owner should then register their lists near each RBL owner. And mail server administrator allow (or not) this class of SMTP server. > they are > spf and rbl are different shoes and both exists since years Don't know about shoes ! maybe my poor english. Regards > > -- Alain Spineux | aspineux gmail com Monitor your iT & Backups | http://www.magikmon.com Free Backup front-end | http://www.magikmon.com/mksbackup Your email 100% available | http://www.emailgency.com
