dan brickley danbriw3org begin pgp signed message hash sha1 gordon mohr wrote eugen leitl writes sun 11 aug 2002 gordon mohr wrote cryptosign outgoing mail dont set mailwall whitelist accept unsigned mail spoofed yup ive meaning cobble together procmail script google searches didnt turn anything anyone get first guess want config file mailboxes normally sign mail procmail runs gpg adds headers users dont like entering passphrases sending email usb fobs smart cards removable hardware yet widespread bad assumption reasonable ui would enter passphrase time launch mail program never per day sometimes per week fwiw enigmail addon mozillas mail client happily talking gpg believe pgp choose long remembers passphrase default 15 mins see httpenigmailmozdevorg feature enough get pine habit since answer original question combination spamassassin shared whitelists means forged headers pretty much spam see inbox dan begin pgp signature version gnupg v106 gnulinux comment using gnupg mozilla httpenigmailmozdevorg id8dbqe9vvayphxvl3mijqrakddaj4mlo7y0aki66h5aiwbmsx8qpegcfsqgi zw2xmlcnqtrzalpimthvlr8 wdf end pgp signature httpxentcommailmanlistinfofork sun 11 aug 2002 231558 0000 forged whitelist spam