Greylisting, DNSBL and SURBL, SpamAssassin and rspamd, quarantine and false positives. Rules and Sieve recipes go in Rules, Sieve & routing instead.
hMailServer 6.3.3 — signed 15 September 2026, Windows and Linux, database schema 6040, and a drop-in upgrade from any 5.x install.Download 6.3.3 Documentation