https://bugs.exim.org/show_bug.cgi?id=3094
Bug ID: 3094
Summary: :at_start: for headers_add in routers & transports
Product: Exim
Version: 4.97
Hardware: All
OS: All
Status: NEW
Severity: wishlist
Priority: medium
Component: Delivery in general
Assignee: unallocated@???
Reporter: jgh146exb@???
CC: exim-dev@???
Currently headers added by router or transport always go at the end of the
existing
headers (after any removals). It would be good to support the same flexibility
that
is supported by the ACL header manipulations.
Doing so will probably mean an additional pass over the headers; no longer
being able
to do removals in the send-to-wire path because we need to do removes before
adds
(so that a remove and add of the same header works as a replace). Would we
want to
take the efficiency hit for all configs, or do we accept a two-path
code-complexity
addition?
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