On Tue, 15 Jul 1997, John Henders wrote:
> I'm struggling trying to find a way to test merely for the existance of
> a header entry, in particular, X-UIDL, which currently is only present
> in spam mail. It seems like filter cannot do this, at least everything
> I've tried doesn't work, using wildcards to match the random string of
> digits in the X-UIDL header doesn't do what I want. Is there a way to
> test for the mere existance of a header entry, regardless of what it
> contains?
if $h_X-UIDL is not ""
works for me. Of course, it won't pick up an empty header...
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