.\"	$OpenBSD$
.\"
.\" Copyright (c) 2019 Martijn van Duren <martijn@openbsd.org>
.\"
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
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.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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.\"
.Dd $Mdocdate$
.Dt FILTER-ADMDSCRUB 8
.Os
.Sh NAME
.Nm filter-admdscrub
.Nd Administrative Management Domain scrubber
.Sh SYNOPSIS
.Nm
.Op Fl rv
.Op Ar authserv-id
.Sh DESCRIPTION
.Nm
checks mail for
.Ql Authentication-Results
headers in the requested
.Ar authserv-id
domain and removes them.
This filter is intended to be used as the first filter at a border MTA.
This should prevent utilization of these headers in further filters or MTAs when
they don't originate from within it's own trusted domain.
The
.Fl r
flag can be set to reject mails containing these headers.
If
.Ar authserv-id
is not specified it defaults to opensmtpd's
.Ic admd
option.
For more verbose logging the
.Fl v
flag can be used.
.Sh SEE ALSO
.Xr smtpd.conf 5
.Sh STANDARDS
.Rs
.%A M. Kucherawy
.%D May 2019
.%R RFC 8601
.%T Message Header Field for Indicating Message Authentication Status
.Re