Re: [exim] message-id related spam filtering is rejecting my…

On Sat, Nov 25, 2006, Ian P. Christian wrote:
> A user on a server of mine recently forwarded me this:

> ---------------------------------------------------

> Your message triggered a spam alert on my system (i.e. it didn't show as
> definitely spam but it contained warning signs).

> Checking, the problem is the header line:

> Message-ID: <006801c70fd2$f74520c0$1064a8c0@James>

[cut for brevity]

> Though other algorithms will work, it is RECOMMENDED that the right
> hand side contain some domain identifier (either of the host itself or
> otherwise) such that the generator of the message identifier can
> guarantee the uniqueness of the left hand side within the scope of
> that domain.

MTA is not unconditionally required to abide to either SHOULD or in this
case, what it is RECOMMENDED to. A MTA that violates SHOULDs isn't
non-RFC-compliant.