Raymond Scholz <rscholz@tzi.de> writes:

> | `Message-ID'
> |     This required header will be generated by Message.  A unique
> |     ID will be created based on the date, time, user name and
> |     system name.  Message will use `mail-host-address' as the
> |     fully qualified domain name (FQDN) of the machine if that
> |     variable is defined.  If not, it will use `system-name', which
> |     doesn't report a FQDN on some machines - notably Suns.
> 
> But Message still uses `system-name' for Message-ID generation. My
> tiny knowledge of Lisp tells me, that Message takes `system-name',
> looks for a `.' in it and calls it fully qualified after that. If
> there is no `.' in it, it uses other alternatives (including
> `mail-host-address') to build a unique Message-ID.

This came up on the list about 2 months ago, but nothing was done
about it.  This patch against current CVS will fix the message-id
generation to match the documentation: