image-only spam -- ideas, what to do?

[John Villalovos]

On 12/12/06, Bill McClain <wmcclain at salamander.com> wrote:
> Bogofilter relies more on header information in these cases. I found it
> useful to set "block_on_subnets=yes", which adds ip address information to
> the database (and expands the database token count by about 20%). Ip address
> ranges can be very good discriminators.

I add this to my /etc/procmailrc.  It adds a header if there is an inline image.

:0 HB
# If it has an inline image, put in a header to indicate so.
* src=(3D)?\"cid:.*@.*\"
{
    :0 fwh
    # Make sure space at end of header.
    | formail -I"X-Inline-Image: "
}