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= mta-sts-query(1)
:doctype: manpage
:manmanual: mta-sts-query
:mansource: postfix-mta-sts-resolver
== Name
mta-sts-query - retrieve MTA-STS policy of a domain
== Synopsis
*mta-sts-query* [_OPTION_]... _DOMAIN_ [_KNOWN_VERSION_]
== Description
Retrieve the MTA-STS policy of a domain and display the result on standard
output. This diagnostic utility is also useful without Postfix.
MTA-STS, specified in RFC 8461 [0], is a security standard for email servers.
When a site configures MTA-STS, other mail servers can require the
successful authentication of that site when forwarding mail there.
== Options
*-h, --help*::
show a help message and exit
*-v, --verbosity* _VERBOSITY_::
set verbosity level: _debug_, _info_, _warn_ (default), _error_, or _fatal_.
*DOMAIN*::
domain for which to retrieve the MTA-STS policy
*KNOWN_VERSION*::
latest known version (default: None)
== Examples
Retrieve MTA-STS policy for dismail.de:
*mta-sts-query dismail.de*
== See also
*mta-sts-daemon*(1), *mta-sts-daemon.yml*(5)
== Notes
0.::
*SMTP MTA Strict Transport Security (MTA-STS)*: https://tools.ietf.org/html/rfc8461
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