Re: [exim] Stacking or renaming headers

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Autor: Jeremy Harris
Datum:  
To: exim-users
Betreff: Re: [exim] Stacking or renaming headers
On 19/03/2023 17:42, Ian Z via Exim-users wrote:
>    X-Original-Foo: the-ur-foo
>    Foo: the-no-longer-ur-foo

>
> I am not thinking of a header with addresses here, so Exim's rewrite
> mechanism doesn't apply. Is there a "best" or "accepted" way to do
> this? In particular, can I do this in an ACL:
>
>    add_header = X-Original-Foo: $h_foo:
>    set acl_m_original_foo = $h_foo:
>    remove_header = Foo
>    add_header = Foo: the-no-longer-$acl_m_original_foo


Yes. And you don't need the temporary variable.

> (I am not sure if the last add_header trum^H^H^H^Hoverrides the
> preceding remove_header.)


No.
>
> And if not in ACL, can I do something similar in a router or transport?


Yes, both.
--
Cheers,
Jeremy