Re: [Exim] filtering ideas for stopping spam: Message-Id

> One thing this lets through is messages which have NO Message-ID:
> header, since exim adds a proper one if it is missing completely.
> would just start putting in valid message IDs.. sigh..

Maybe this can be checked with:

if $header_message-id contains $primary_hostname

Or:
if $h_message-id ends "@"$primary_hostname">"
(I don't know if this is valid.)

I wouldn't use either by themselves, because I have valid mail come to my
server without a Message-Id. But I do received mail for
"Undisclosed.Recipients" or "Undisclosed Recipients" without any
Message-Id that I want to block.

Jeremy C. Reed
echo 'G014AE824B0-07CC?/JJFFFI?D64CB>D=3C427=>;>6HI2><J' |
tr /-_ :\ Sc-y./ | sed swxw`uname`w