Hello,

when IMP sends a message, it adds Received: header containing address of
connecting server, or first server in X-Forwarded-For: HTTP header (if it
exists).

However if untrusted client sends whatever data in X-Forwarded-For: header,
the address (e.g. from private IP raqnge) is used. This results into useless
garbage inserted into mail headers which mey not be found in horde logs
(horde does not always log the correct IP).

Is it possible to add option either to ignore the header, or only to trust
defined set of IP addresses/ranges which would be trusted (followed)?

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