[Mailman-Users] DMARC and Bellsouth, etc.

Mark Sapiro mark at msapiro.net
Wed Apr 16 20:55:56 CEST 2014

On 04/16/2014 11:11 AM, Stephen J. Turnbull wrote:
> (2) You can break your mailing lists by using the author_is_list
>     option in Mailman 2.1.16 and later.  This option will only be
>     available if the site configuration has ALLOW_AUTHOR_IS_LIST set
>     to "Yes".  This will cause the list to replace the author's
>     address with its own address in "From".  However, your domain may
>     not permit this, as it's a clear violation of the mail RFCs.

The ALLOW_AUTHOR_IS_LIST switch has been removed (is effectively always
Yes) for Mailman 2.1.18 (watch for a release announcement soon or pull
the head of the lp:mailman/2.1 bzr branch ;)

> (3) There is a patch to have Mailman encapsulate posts from yahoo.com
>     addresses in a "one-message digest".  This is RFC-conformant, but
>     some users may have difficulty reading such mail.  (Frequently
>     reported on iPhones.)  It also requires using a third-party patch
>     for Mailman, which may be prohibited by your ISP or beyond your
>     technical capability in the short run.

This capability, without the dnspython dependency, is an option to (2)
above, even in 2.1.16.

In 2.1.18 There is an enhanced set of controls that can be applied to
all mail From: domains with DMARC p=reject and (optionally, default
includes) p=quarantine policies. See
<http://wiki.list.org/display/DEV/DMARC> for a bit more detail.

Mark Sapiro <mark at msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan

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