Please install Crypt::OpenPGP perl module firstly. It is better to use OS dependent pacakge system since Crypt::OpenPGP depends a lot of other packages. PGP/PGP Based Authentication In Posting check_pgp_signature options enables PGP/GPG based auth. If the degital signature is confirmed, the user can post articles. article_post_restrictions = reject_system_special_accounts check_pgp_signature reject This function is disabled by default. Change article_post_restrictions if use. PGP KEY RING directories are separeted for each purpose. For example, the keyring dir for article pgp auth is $ml_home_dir/etc/pgp-article-post-auth/ directory, the keyring dir for remote administration by command mail is $ml_home_dir/etc/pgp-admin-command-mail-auth/ directory. Use pgp2, pgp5 and gpg commands to edit keys under them It is useful to use the following fmlpgp wrapper command. The wrapper sets up proper environment variables. [Example] operations for elena ML fmlpgp elena --article-post-auth -kg the command line options available: --article-post-auth (auth for post article) --command-mail-auth (auth for command mail) --admin-command-mail-auth (auth for admin command mail) --article-post-encrypt (article encryption) Available wrappers follow: pgp2: fmlpgp pgp5: fmlpgp5 fmlpgpe fmlpgpk fmlpgps fmlpgpv gpg: fmlgpg fmlgpgv