Chris,

Yes, all listserv lists (as well as all other list management software such as mailman) have this problem. It’s actually worse, because several other ISPs honor Yahoo’s DMARC p=REJECT commands. Gmail does not reject, but puts the post in the spam folder.

And there is currently no solution that allows lists to continue to work as they have in the past. Essentially, the FROM address must match the address of the sending server or the message will be marked as REJECT.

There are several ongoing discussions on this forum.

best regards,
Larry
<and apologies for the top post; the quote was rather lengthy>


On Apr 14, 2014, at 10:40 AM, Chris Barnes <[log in to unmask]> wrote:

> I recently started getting bounces on my lists for ALL of my subscribers who use Yahoo.com as their email provider:
>    Last error: 5.7.9 554 5.7.9 Message not accepted for policy
>      reasons. See http://postmaster.yahoo.com/errors/postmaster-28.html
> 
> When I asked my local Listserv postmaster about this, they sent me back the reply appended to the bottom.   My question is:   is EVERYONE who owns Listserv lists having this problem?
> 
> --- 
> 
> Howdy, 
> 
> On April 8 Yahoo implemented a new policy that blocks messages from lists not hosted by Yahoo or Google. The idea is to only allow messages which comply to a certain security standard to prevent phishing scams and other forms of email abuse. The immediate problem with this policy is that all universities running Listserv are affected and there is little we can do about it. Note that all domains hosted by Yahoo are affected which includes email addresses from ISP's such as Comcast and AT&T. 
> 
> The only current solution is to unsubscribe @yahoo addresses from your lists and send them an email explaining why they are being removed and prompt them to subscribe with an alternative email address. While this is not ideal, this is going to be the solution unless Yahoo rolls back this decision. 
> 
> I hope that clears up the confusion over what is happening. If you have any more questions please let us know as we are always glad to help. Have a great day! 
> 
> To unsubscribe from the LSTOWN-L list, click the following link:
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> 

--
Larry Finch
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