---
name: "mhdr"
section: "1"
platform: "linux"
package: "mblaze"
version: "1.1-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/mhdr"
---

# mhdr(1)

print message headers

## NAME

**mhdr** – print message headers

## SYNOPSIS

**mhdr** \[**-h** *hdrs* \[**-p** *parameter*\]\] \[**-d**\] \[**-H**\] \[**-M**\] \[**-A** \| **-D**\] \[*msgs ...*\]

## DESCRIPTION

**mhdr** prints the headers of the specified *msgs*.( See [mmsg(7)](/mmsg/7.md) for the message argument syntax.)

If no *msgs* are specified, **mhdr** will default to the current message.

If no *hdrs* are specified, **mhdr** will print all headers.

The options are as follows:

- **-h** *hdrs*

  Only print the values of headers in the colon-separated list *hdrs*.

- **-p** *parameter*

  Extract a particular RFC 2045 *parameter* from the specified *hdrs*.

- **-d**

  Decode the *hdrs* according to RFC 2047.

- **-H**

  Prefix output lines with the filename of the message, followed by a tab.

- **-M**

  Search for all occurrences of the *hdrs* (default: only the first).

- **-A**

  Scan for RFC 5322 addresses in the *hdrs* and print them, one per line.

- **-D**

  Assume header contains RFC 5322 date and print as Unix timestamp.

## EXIT STATUS

The **mhdr** utility exits 0 on success, 1 if no header was printed, and \>1 if an error occurs.

## SEE ALSO

[mmsg(7)](/mmsg/7.md) N. Freed and N. Borenstein, *Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies*, RFC 2045, November 1996. N. Freed and N. Borenstein, *MIME (Multipurpose Internet Mail Extensions) Part Three: Message Header Extensions for Non-ASCII Text*, RFC 2047, November 1996. P. Resnick (ed.), *Internet Message Format*, RFC 5322, October 2008.

## AUTHORS

Leah Neukirchen ⟨*leah@vuxu.org*⟩

## LICENSE

**mhdr** is in the public domain.

To the extent possible under law, the creator of this work has waived all copyright and related or neighboring rights to this work.

**http://creativecommons.org/publicdomain/zero/1.0/**