On 2023-06-06 1:36 p.m., John Stoffel wrote:
"Oliver" == Oliver Glas writes:
https://mimedefang.org/ is where I'd go to look for details on how to
implement it. I haven't done it myself.
Most likely in the "filter" function of "mimedefang-filter" perl script:
#***
# %PROCEDURE: filter
# %ARGUMENTS:
# entity -- a Mime::Entity object (see MIME-tools documentation for
details)
# fname -- the suggested filename, taken from the MIME Content-Disposition:
# header. If no filename was suggested, then fname is ""
# ext -- the file extension (everything from the last period in the name
# to the end of the name, including the period.)
# type -- the MIME type, taken from the Content-Type: header.
#
# NOTE: There are two likely and one unlikely place for a filename to
# appear in a MIME message: In Content-Disposition: filename, in
# Content-Type: name, and in Content-Description. If you are paranoid,
# you will use the re_match and re_match_ext functions, which return true
# if ANY of these possibilities match. re_match checks the whole name;
# re_match_ext checks the extension. See the sample filter below for
usage.
# %RETURNS:
# Nothing
# %DESCRIPTION:
# This function is called once for each part of a MIME message.
# There are many action_*() routines which can decide the fate
# of each part; see the mimedefang-filter man page.
#***
Within the "filter" function, there are several options (actions) on
what to do with the MIME entity:
e.g. "action_drop", "action_drop_with_warning",
"action_replace_with_warning"
https://mimedefang.org/man_Mail::MIMEDefang::Actions.html
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