DCC

The DCC maintainers have been in touch, noting that several sites seem to have set up SpamAssassin and DCC, but have not modified their firewalls to allow DCC traffic through! This is wasting their bandwidth, and we'd appreciate if users could check their configuration.

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Also, if you're running a large site, processing upwards of tens of thousands of messages a day, the DCC maintainers have requested that you consider setting up your own DCC server as described in dccd(8), and arrange to peer with the rest of the public servers.

Razor

The Razor2 system requires outbound access to servers on tcp port 2703 in general (the servers are, at the moment, on the class C 66.151.150.0/24, but allowing only access to those machines would be too restrictive). The razor2 protocol may also use the tcp or udp echo ports, but I can't remember when. If you are still using razor1, upgrade, as Spamassassin does not support this now. Razor1 made outbound connections to servers on tcp port 2702.

Pyzor

I believe pyzor uses udp port 24441. Confirmation?