This results in a zero-byte attachment and it will always get past Declude Virus, even if it has one of the commonly banned extensions associated with viruses (unless this has been addressed in a more recent interim that I'm not aware of ).
I haven't hit a single file as yet with this filter. It may be that this was in fact fixed with a more recent version of Declude Virus ...
FWIW, I can't recall any issue where the size of a file (even 0-byte) will prevent Declude Virus from banning the file based on the extension. Of course, a 0-byte file won't be blocked by the virus scanner (since it can't contain a virus), but Declude Virus should block it as expected.
-Scott
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