[exim] Re: headers_add :at_start: in routers

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Author: Jeremy Harris
Date:  
To: exim-users
Subject: [exim] Re: headers_add :at_start: in routers
On 15/05/2024 19:32, Ian Z via Exim-users wrote:
> Would it work to specify add_header in an auxiliary ACL actuated
> through an expansion in the transport?


Without checking, I'm quite dubious this would work (or continue
to work in the face of future code-changes.

Currently I'd call that "undefined behaviour" in the standards-body sense.
--
Cheers,
Jeremy


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