Dr Robert Young wrote: > Is there a particular "port" and/or "protocol (TCP/UDP) that must be > opened on any firewalls that might be on the network for the plugin to > work?
You don't "need" to open any ports, however you must be able to resolve DNS queries. In general you can test it by using "host www.spamassassin.org".. if you get an answer back, DNS works. If not, DNS doesn't. In general your nameserver must be able to perform queries to port 53 as a UDP client. If your firewall is stateful, you only need to open it in the outbound direction (if you've locked down outbound traffic at all). If it's a stateless packet filter, then you'll need to open both. You can set what nameservers your SA box will use in in /etc/resolv.conf.
