OK, that's an awkward mixture to handle.
I suspect you're going to have to manually spot Sieve filters and
handle them separately. I assume you're working with file= rather
than data= in your redirect router? So, starting with a filename,
construct an expansion to identify by using ${readfile } and ${if match }.
Use that in condition= in a redirect router immediately before your
existing one. Tell your Sieve users to take off the trailing / from
any explicit filenames. Use a transport which always appends a /
and uses directory=.
Then raise a wishlist item for Exim's Sieve handling to support
a means for configuring something other than "inbox". I'm unsure
if a free choice is warranted, perhaps just a choice of "inbox/".
--
Cheers,
Jeremy
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