cian davis vbtjcxskynetie begin pgp signed message hash sha1 greylisting effective opinion longer getting worst effective every day ive seen lots spamming machines already sending email times getting 505 temporarily unavailable mta get whitelisted like proper mta tries second time also greylisting wasnt good method beginning really busy environment usually need emails straight away instead waiting usual 15 mins far mta resend regards sergiusz skynet deal 20000 emails day greylisting immediately reduced spam 98 still effective combination dnsbls spamassassin razor bayes get little spam 1 2 per month need tweak settings reduce false positives bit yes delay problem rarely enough issue granted business environment might issue regards cian begin pgp signature version gnupg v146 gnulinux comment using gnupg mozilla httpenigmailmozdevorg id8dbqfhmwg02yuma7r3b8ranheakcu5i0ybb2tsggv7akgmdclvewccdqme lvw30xqs9aelorak8umiljw qqz end pgp signature thu 07 aug 2008 193130 0000 ilug advice antispam strategyblocking software