duplicate subject lines in headers (again)

[Warwick Brown]

> It does seem likely that this is specific to MailScanner with Exim, and
> it (at least the older issue) is reportedly fixed before your 4.85.2
> which makes me think that your "horrendously complex" environment and
> resultant Exim config may be at least part of the issue.

I will privately mail you my exim config....don't really want it in public domain