Thanks sm. It is indeed sendmail that is responsible - I totally ignored that part in the logs!
I guess it is time to hunt down the sendmail list. Cheers, Anthony. -----Original Message----- From: SM [mailto:[EMAIL PROTECTED] Sent: Thursday, 7 June 2007 1:59 PM To: users@spamassassin.apache.org Subject: Re: Can anyone explain this "Milter add:..." spike in my logs by spamd! At 20:19 06-06-2007, Anthony Kamau wrote: >After getting a rather large logwatch report, I went hunting in my logs >to get to the root of the problem. I noticed a very big spike in the >number of occurences of the following line in the /var/log/maillog file: > >"Milter add: header: Content-Type: multipart/mixed; boundary=..." spamd is not doing that. It's your milter which is adding that header. Regards, -sm