This is getting OT, but... On Wed, Oct 30, 2019 at 02:21:12PM +0000, Johannes Demel wrote: > My solution > 1. If "Mail From 'discuss-gnuradio@gnu.org'" > 2. If "Mail To 'discuss-gnuradio@gnu.org'"
Mailing list software for decades inserts unique headers for filtering purpose. "List-Id" is AFAICT the most common one, which is also used by GNU mailman. It has been specified in 2001 in RFC2919 http://www.faqs.org/rfcs/rfc2919.html Regards, Harald -- - Harald Welte <lafo...@osmocom.org> http://laforge.gnumonks.org/ ============================================================================ "Privacy in residential applications is a desirable marketing option." (ETSI EN 300 175-7 Ch. A6)