On Thu, Sep 21, 2017 at 12:12:38PM +0100, Jeremy Harris wrote:
> 
> Yup, invalid per rfc5322 section 3.2.2:
> 
> "However, where CFWS occurs in this specification, it MUST NOT
>    be inserted in such a way that any line of a folded header field is
>    made up entirely of WSP characters and nothing else."
> 
> If the SA report is liable to include empty lines, you should not use
> it unedited in constructing a header to be added.  Note that the Exim
> docs already warn about non-ASCII content; also problematic in
> headers.
> 

Thanks for the quick and helpful response, 
It seems the best course of action for me is to not add the $spam_report
header until it can be made compliant.

Regards,

Kate Dawson
-- 
"The introduction of a coordinate system to geometry is an act of violence"

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