Re: DMARC: perspectives from a listadmin of large open-source lists

[Theodore Ts'o <[e-mail]>]

On Wed, Apr 16, 2014 at 11:00:31AM +1200, Brian E Carpenter wrote:
> 
> > (If the originating domain is expressly *not* OK with the
> > redistribution, the mailing list should bounce the message back to the
> > author saying as much.)
> 
> Isn't that exactly what p=reject implies? If so, the logical behaviour
> for all list software would be to check the DMARC record for the
> originating domain of each message, and bounce it if p=reject.

The question is which is more or less unfriendly? 

1)  Forbidding yahoo.com users from participating on mailing lists

2)  Rewriting the from field of yahoo.com users.

I could easily see the mailing list software making this be
configurable, so it's up to each mailing list admin.  :-)

	      	      	    	 	      	      - Ted

P.S.  #1 could also be combined with a nice message inviting the
yahoo.com user to find another e-mail provider.