Reproducible defects in 6.3.3 or a pre-release: version, platform, database, exact steps and the log lines. Confirmed ones are raised on GitLab and linked back here.
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