using dcc under amavis and postfix on ubuntu feisty fawn 7.04

Most the guides out there for setting up spamassassin seem to convey that simply installing dcc and the likes makes them work. I ran tcpdump on port 6277 though and didn’t see any dcc traffic.

1) I found that DCC in commented out by default under /etc/spamassassin/v310.pre
2) I added the following to /etc/spamassassin/

use_dcc 1
dcc_path /usr/bin/dccproc
dcc_add_header 1
dcc_dccifd_path /usr/sbin/dccifd

Note thatI think dcc_add_header is legacy and doesn’t work, and that the dcc_ifd path throws an error in the next debug section, so is likely not needed.

Then I found when running a test:

Step4: Test DCC is working via Spamassassin

First you can download a common spam message that will trigger DCC detection at:

# wget ‘’

Next, test a message via Spamassassin in debug mode for the results

# spamassassin -t -D < spam-mail.txt

I saw DCC traffic, but not when amavis was running. Recalling how I had to add clamav to the amavis user, as everything runs non-root, so:

3) I added the dcc user to the amavis group and restarted amavis for the sake of it, and I’m seeing dcc traffic now on port 6277.

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