Since somebody emailed me asking if this had been resolved and how, here's the information, for them and for Google:
In /etc/clamav/clamav-milter.conf, add/modify this setting:
AddHeader Add
See /usr/share/doc/clamav-milter/examples/clamav-milter.conf for details.
I think the Ubuntu/Debian package should ship /etc/clamav/clamav-milter.conf with that line included. I'm not even sure why the milter code allows any other setting; by corollary with the Received: header, it doesn't make sense to use "AddHeader Replace", which is the code's default apparently.
Since somebody emailed me asking if this had been resolved and how, here's the information, for them and for Google:
In /etc/clamav/ clamav- milter. conf, add/modify this setting:
AddHeader Add
See /usr/share/ doc/clamav- milter/ examples/ clamav- milter. conf for details.
I think the Ubuntu/Debian package should ship /etc/clamav/ clamav- milter. conf with that line included. I'm not even sure why the milter code allows any other setting; by corollary with the Received: header, it doesn't make sense to use "AddHeader Replace", which is the code's default apparently.