---
name: "mta-sts-query"
section: "1"
platform: "linux"
package: "postfix-mta-sts-resolver"
version: "1.5.0-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/mta-sts-query"
---

# mta-sts-query(1)

retrieve MTA-STS policy of a domain

## 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/1.md), [**mta-sts-daemon.yml**(5)](/mta-sts-daemon.yml/5.md)

## NOTES

0\.

**SMTP MTA Strict Transport Security (MTA-STS)**:  \<https://tools.ietf.org/html/rfc8461\>