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http://bugs.exim.org/show_bug.cgi?id=1411

Jeremy Harris <[email protected]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED




--- Comment #1 from Jeremy Harris <[email protected]>  2013-11-06 20:51:42 
---
You are correct, and cutthrough is incompatible with adding any headers after
the point of receiving the header/body boundary.  This is because we are
copying incoming bytes verbatim to the outbound.  Both data and dkim ACLs are
affected.

At the very least this a documentation lack, and we should probably issue
warning lag messages.  Header-removal ditto.


Note that a data-ACL deny is reasonable; although it wastes transmission effort
and the outbound peer's cpu, the connection is terminated without an SMTP-level
end-of-data mark so the mail is not transferred there.  I'm loath to do similar
on discovery that a header-add was requested in the data ACL.


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