On Tue, 24 Apr 2018 13:35:21 +0100, Tim+ wrote:

John Rumm Wrote in message:

=====snip=====


What are the typical file extensions?

(or perhaps its easier to simply allow .zip and assume anything will be
zipped first)


A bad idea surely? Zipped files are used to conceal all sorts of
nefarious things.

Potentially but it's more accurate to say that a zip file is simply a
container file that can hold any type of file (compressed or not) which
could just as easily be malware as not. They've certainly been used for
such nefarious a purpose in times past as well as providing a convenient
way of sending a group of jpg picture files as just a single attachment
to an email.

A zip file could be likened to the container for Schroedingers cat
that's been alluded to in recent posts elsewhere in this group. Until you
open it, the contents of an anonymous zip file are both bonumware and
malware simultaneously. :-)

--
Johnny B Good