Re: [Exim] spam calls home

On Wed, Nov 26, 2003 at 05:10:02PM -0500, Richard Welty said:
> On Wed, 26 Nov 2003 12:21:54 -0500 Ken Lowther <hermit@???> wrote:
>
> > Many spams now call home by requesting a 'zero byte' gif when you
> > open the page. This is also used for other people wanting to see if
> > you opened the mail. Are there any rules for checking this?
>
> this is an MUA issue, not an MTA issue, making it offtopic here.

Yeah, it's a little off topic, but it can by handled by preprocessing
before mail gets to a MUA as well.

Check out John Hardin's procmail security (google for it) which has some
filtering for this kind of thing.