---
name: "arcsign"
section: "1"
platform: "linux"
package: "python-dkim"
version: "1.1.8-3"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/arcsign"
---

# arcsign(1)

Script for ARC signing messages on stdin

## NAME

arcsign - Script for ARC signing messages on stdin

## VERSION

0\.9.2

## DESCRIPTION

arcsign is a filter that reads an RFC822 message on standard input, and writes the same message on standard output with a ARC-Signature lines prepended.

## USAGE

The signing options are specified on the command line:

arcsign selector domain privatekeyfile srv\_id

Note: arcsign will only use authentication results header fields with an authserv-id that matches srv\_id as the input fields for the ARC chain.

## AUTHORS

This version of **arcsign** was written by Brandon Long \<blong@google.com\> and is derived from **dkimsign**, written by Greg Hewgill \<greg@hewgill.com\>.

This man-page was created by Scott Kitterman \<scott@kitterman.com\> and is licensed under the same terms as dkimpy.