[Mailman-Users] DMARC and Bellsouth, etc.

[Stephen J. Turnbull]

Larry Kuenning writes:

 > Query:  On a very low-traffic mailing list (i.e. one where the list 
 > admin doesn't think it too much trouble), would it be a reasonable 
 > workaround for the list admin to paste the content of a 
 > message-to-be-moderated (i.e. one From: a yahoo address) into a new 
 > message _of his/her own_ and send _that_ to the list?

Yes, although given the available alternatives in the web admin pages
I don't think this is worth the trouble for almost anybody (I
understand that you have a very special situation with a relatively
old Mailman that's working just fine, thank you, for you, but that's
pretty unusual nowadays).

 > This message could include the original From: address _in its body
 > text_ (not its headers) along with a brief reference to the yahoo
 > problem to explain the unusual format.

 > 1.  Other subscribers replying to the message will get MUA-generated 
 > text saying "Larry List-Admin wrote" instead of "Sonia Subscriber 
 > wrote".  Those who pay attention and take a little trouble can change 
 > that before clicking Send, but many won't.

Change the display name to "Sonia Subscriber/lla" (the usual
convention for letters written by a secretary but signed by the boss).

 > 2.  Similarly, other subscribers wanting to reply privately will send 
 > their replies to Larry List-Admin instead of Sonia Subscriber if they 
 > aren't careful (and some of them won't be).

Add a "Reply-To: sonia at her-place.net" header field.

The recommendations above violate the letter but conform to the spirit
of RFC 822 and successor standards.

 > The list admin can forward these replies, but in a few cases they
 > may contain confidential material that the admin shouldn't have
 > seen.

The above practices should mitigate this issue.