If you want to use an Exim filter, you need to use allow_filter. If you
want to use ":fail:" in an alias file, you need to use allow_fail. If
you want an Exim filter that uses the "fail" command (not ":fail:"),
then you need both.
This is all covered in the docs:
http://exim.org/exim-html-4.50/doc/html/spec_22.html#IX1801
http://exim.org/exim-html-4.50/doc/html/spec_22.html#IX1803
http://exim.org/exim-html-4.50/doc/html/spec_42.html#SECT42.5
Thanks you so much! I imagine I'll be able to get it from there :)
Ciao!
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