If you are planning to use TLS (transport layer security) on your mail server, be aware that spamd has no TLS. If your MTA requires TLS, or communicates with other MTAs that require TLS, then you will probably have to whitelist those MTAs and perhaps make TLS optional on your MTA. spamd and PF work together. PF will direct any known good clients directly to the mail server. Similarly, known bad cl