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

+++ Jeremy C. Reed [exim-users] <20/08/01 09:30 -0700>:
> Sometimes I receive spam with no Message-Id or it is set to <>.
> Does anyone have any advice on whether I should block mail with
> missing Message-Id or set to "<>"? (Does anyone have success with this?)

You can block on fake message ids like

<$W$TWRGRsdgwert@>
<>

it is ratware sign. Too many b0rken mailers dont generate their own message
id - but the sending MTA should insert its message id header in such a case.

No message id = reject. You'll be safe I guess.