** PGG based MUA
-PGG is outdated PGP library used by old Gnus (< v5.11), MH-E, etc.
+PGG is outdated PGP library used by old Gnus (<= v5.11), MH-E, etc.
There is a PGG backend written EasyPG called pgg-epg.el. However,
EasyPG API is a superset of PGG and pgg-epg.el provides nothing but