Re: Mailing lists - assumptions

On Sat, Apr 19, 2014 at 11:00:35AM -0700, Ned Freed wrote:
> You want any downstream delivery errors to be reported to the original sender,
> so ideally you'd leave the MAIL FROM unchanged. But now an SPF check on the
> MAIL FROM will fail because alum.mit.edu's IP address isn't going to be 
> allowed list.
> 
> The usual way this is solved is with a more complex forwarding address,
> one that incorporates a timestamp and a verifier. As I noted 
> previously the Sender Rewriting Scheme is one way to do this, but of
> course you can use any encoding you want since only your systems have
> to understand it.

You mean like this:

Return-path: <SRS0=/[email protected]>

:-)

Sure, it's a bit ticklish, but it's obviously implementable.

					- Ted

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