Does spamdyke support TLS?
As of version 2.6.0, spamdyke supports TLS (which is just another name for SSL). spamdyke will detect TLS and pass it through seamlessly. Obviously, none of its post-connect filters will work (e.g. graylisting) because all of the traffic will be encrypted. However, if spamdyke has access to a server certificate, it will handle the TLS itself and all of its filters will work as before. Bonus: spamdyke will provide TLS even if your qmail has not been patched to provide TLS! As of version 4.0.0, spamdyke supports SMTP-over-SSL (SMTPS) when the tls-level option is set to smtps. See the README page for complete details.