Apparently, several days ago pobox.com (which I use as a forwarding
agent) turned on the Sender Rewriting System (SRS), which is related to
the SPF project.

I've just discovered that as a result, a lot of mail to me is being
challenged that wasn't being challenged before, and individual
confirmations are no longer working properly.  As far as I can tell,
here's what's happening.

The first problem is "to" sources in the incoming filter.  Since "to"
sources only match the envelope recipient, and SRS changes the envelope
recipient fairly drastically, a lot of my old patterns no longer work.
I'm watching the logs and changing them manually, but this seems risky
because the kind of rewriting that SRS does isn't completely
standardized.

The second problem is with confirmations.  When someone responds to a
confirmation request, SRS rewrites their envelope sender to a unique
value, with the result that TMDA sends them another confirmation
request!  I've already had someone horribly confused by this.  For now,
I'm just manually adjusting the pending queue when the first
confirmation arrives, but I can't always do that quickly enough to avoid
the confusion.

I've checked archives for both TMDA and the SPF project at pobox.com,
with no luck.  Is anyone else running into these problems?  If so, what
sort of workarounds are you using?

I suspect a real fix requires new functionality in TMDA.  Does anyone in
the developer community have any advice?

Thanks!
Allen
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