Why don't SpamAssassin DCC/Razor/RBL checks work?

Symptom: Network-related SpamAssassin tests don't seem to have any effect.

Probable Cause: These tests must be specially enabled when SpamAssassin is used in conjunction with MIMEDefang. To enable them, you must do two things:

1. Enable them in the file /etc/mail/spamassassin/sa-mimedefang.cf. MIMEDefang uses this file for its global SpamAssassin configuration.
2. In your filter, add the line: $SALocalTestsOnly = 0;

You may also need to add these lines to /etc/mail/spamassassin/sa-mimedefang.cf:

use_dcc 1
dcc_timeout 10
dcc_path /usr/local/bin/dccproc

(Substitute appropriate paths for your system.)