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> From: Chris Shenton <chris@Shenton.Org>

> > The DCC uses checksums of things.  There is no reasonable way I can
> > see to get regular expressions into the mix except as some kind of
> > pre- or post-filter. ...


> Understood.  I wonder if you could do a checksum on part of an
> address.  For example, if my address looked like:
>
>         listname-1234567.890@example.com
>
> Could you compute a sum on the part minus the (presumed) VERP tag,
> like:
>         listname@example.com

How, without a regular expression to skip the VERP tag?

Maybe regular expressions of some sort are the right answer.
They would need to be fast and so very limited.  Their support
(r.e. compiler and runtime) would also need to be universally
available, including on Windows systems.


Vernon Schryver    vjs@rhyolite.com