Both techniques are acceptable and different folks have different recommendations. Essentially the service providers for mail are going to force mailing list operators to change, and frankly the changes are minimal enough that it's hard not to support their efforts to control fraudulent email using DMARC.
On Tuesday, June 3, 2014 1:54 PM, Nathan Kurz <[email protected]> wrote: On Mon, Jun 2, 2014 at 8:06 PM, Joe Schaefer <[email protected]> wrote: > Right now I'm able to offer a choice: either drop all the mailing-list > message munging, or let the mailing list munging extend to From > and DKIM-Signature headers. Both will ensure delivery of mail > for the foreseeable future, both will have no direct impact on how > we use mail, no matter who decides to adopt rejection policies for DMARC > now or in the future. Given those choices, I'd say "Munge away!" Is there an advantage to using a .INVALID suffix for the replaced From address (as you did in the example) instead of the list address some articles recommend: http://www.dmarc.org/supplemental/mailman-project-mlm-dmarc-reqs.html --nate
