Quoting Jeroen Massar (jeroen at unfix.org):
> Note, that like SPF, it won't directly stop spam. It does take care
> though that backscatter won't be possible anymore when a domain uses
> DKIM. Unlike SPF it does not require intermediate domains to support it
> (with SPF when one has a mailinglist or a forward address the domain
> that does the relay has to do SRS for it to keep on working, thus
> requiring remote parties to fix stuff because another party added SPF
> records to their domain, which IMHO makes SPF broken by design as
> forwarding/mailinglists is a very often used mechanism).
The above is incorrect as to mailing list managers = MLMs (e.g.,
majordomo, Mailman, Sympa), because MLMs write new envelope headers
on outgoing mail reflecting information specific to the MLM host.
SRS wrapping _is_ required, in an SPF environment, for /etc/alias,
~/.forward, and equivalent forwarding mechanisms, but not for mailing
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