The best place to look for DMARC information is www.dmarc.org<http://www.dmarc.org>.


From: LISTSERV Site Administrators' Forum [mailto:[log in to unmask]] On Behalf Of Matthew Black
Sent: Monday, April 28, 2014 12:21 PM
To: [log in to unmask]
Subject: Re: Yahoo! and the "p=reject" DMARC fiasco

I found an excellent technical discussion on the MAILOP list (mailop.org).

Still wondering if there are release notes for 16.0a telling us what this update does.

matthew black
california state university, long beach

From: LISTSERV Site Administrators' Forum [mailto:[log in to unmask]] On Behalf Of Matthew Black
Sent: Monday, April 28, 2014 9:47 AM
To: [log in to unmask]<mailto:[log in to unmask]>
Subject: Re: Yahoo! and the "p=reject" DMARC fiasco

Sorry to rehash this topic. I wasn't paying attention at the time and have been working through the old posts on the list's web forum.

Has L-Soft developed any documents to better explain this problem? Are there any release notes for 16.0a?

I cannot find where DMARC looks at the From: header as opposed to the SMTP MAIL FROM attribute, which is negotiated during the SMTP conversation. That value is usually reflected in the headers Return-Path: or Sender: That MAIL FROM is usually [log in to unmask]<mailto:[log in to unmask]>. It is unclear from the thread whether DMARC examines the From: header as opposed to the message sender.

Thanks.

matthew black
california state university, long beach

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