MID_CACHE_FILE = $PMVAR/msgid.cache LOCKFILE = $MID_CACHE_FILE$LOCKEXT :0 *$ !SKIP_DUP ?? . *$ !$MSG_DEJAVU * ^Message-ID: * ? $FORMAIL -D 16384 $MID_CACHE_FILE { LOG="duplicate: drop duplicate message $MSGID$NL" :0 $NULL } LOCKFILE # unlock