[Mailman-Users] Executive summary of DMARC issues

[Larry Finch]

On May 15, 2014, at 10:53 AM, Gary Algier <gaa at ulticom.com> wrote:

> On 05/14/14 23:47, Stephen J. Turnbull wrote:
> 
> I then sent an email to the list and to my work sendmail address.  It was delivered to both work addresses and the iCloud address.
> 
> Gmail put it in my Spam folder with the warning:
> -------------------------------------------------------------------
> Be careful with this message. Our systems couldn't verify that this message was really sent by yahoo.com. You might want to avoid clicking links or replying with personal information.
> -------------------------------------------------------------------
> There is also a link to their "Why messages are marked as Spam" page.
> 
> On Yahoo I found the bounce in my Spam folder with the following:
> -------------------------------------------------------------------
> This is an automated message from the Extensible Content Security
> at host wg.ulticom.com.
> 
> The message returned below could not be delivered to its intended
> destinations.
> 
> 
> It seems that in the case of a simple Exchange distribution list, the Yahoo members will fail (into their Spam folder!), some others may fail depending upon their service's SPF fussiness, and others may have to root around in their Spam folders for the content.
> 

On the lists that I manage on listserv I’ve discovered that many ISPs honor Yahoo and AOL’s p=reject, and will not even put the message in the spam folder. Among them are: Comcast, SBCGlobal, AT&T, AOL, Rogers, Earthlink, Hotmail and a few others I don’t recall. So essentially half of my list members will not get posts from Yahoo or AOL.

best regards,
Larry

--
Larry Finch
finches at portadmiral.org