Instead of just modifing the Subject line like
. Spamgourment message marking (keyword: message 1 of 3)
How about added a new header entry like:
. X-Spamgourment: keyword 1 of 3
The "X-Spamgourment:" field make it nearly impossible to miss.
The "keyword" within the HEADER field entry is easy to phrase for sorting and/or filling proposes.
. IOW it makes it easier to write procmail filters.
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DonJr