[Mailman-Users] Self-Approval against From Forgeries

[Adam McGreggor]

On Tue, Mar 17, 2009 at 07:15:58PM -0500, Grant Taylor wrote:
> Ephraim Silverberg wrote:
> > Certain lists of ours are sensitive and, hence, the members of the 
> > list want to ensure that messages are not sent to the list by an 
> > outsider that forges the From line of a valid list member.
> 
> Ok...
> 
> Question:  Why not look in to implementing (and requesting that members
> do too or provide an alternate email for this purpose) something like
> SPF and / or Domain Keys.  If you run either or both filters and your
> subscribers publish records, it will be very difficult for messages to
> be spoofed.

Or, perhaps, just use gpg/pgp.

(I'm not a fan of SPF)

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