Re: [dmarc-discuss] How to block fake forwarders?

2017-10-12 Thread Seth Blank via dmarc-discuss
In addition to Vladimir's post, M3AAWG just published an SPF best practices paper that might be useful: https://www.m3aawg.org/sites/default/files/m3aawg_managing-spf_records-2017-08.pdf Seth On Thu, Oct 12, 2017 at 1:00 PM, Pete Holzmann via dmarc-discuss < dmarc-discuss@dmarc.org> wrote: >

Re: [dmarc-discuss] How to block fake forwarders?

2017-10-12 Thread Pete Holzmann via dmarc-discuss
Vladimir, Thanks for that article. You did cover all of the issues I've seen to date... including one I saw just this morning for the first time! An organization's SPF has: v=spf1 mx include:smtproutes.com include:smtpout.com ~all include:spf.protection.outlook.com -all

Re: [dmarc-discuss] How to block fake forwarders?

2017-10-12 Thread Paul Rock via dmarc-discuss
This is a pretty common practice for domains that people own for brand protection as well - a0l.com has a -all SPF, p=reject DMARC policy, and no MX. On Thu, Oct 12, 2017 at 1:22 AM, Pete Holzmann via dmarc-discuss < dmarc-discuss@dmarc.org> wrote: > Awesome! Thank you SO much :) > > On 12 Oct