---
name: "dkimsign"
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/dkimsign"
---

# dkimsign(1)

Script for DKIM signing messages on stdin

## NAME

dkimsign - Script for DKIM signing messages on stdin

## VERSION

0\.7.0

## DESCRIPTION

dkimsign is a filter that reads an RFC822 message on standard input, and writes the same message on standard output with a DKIM-Signature line prepended.

## USAGE

usage: dkimsign.py \[-h\] \[--hcanon {simple,relaxed}\]\
                    \[--bcanon {simple,relaxed}\]\
                    \[--signalg {rsa-sha256,ed25519-sha256,rsa-sha1}\]\
                    \[--identity IDENTITY\]\
                    selector domain privatekeyfile

mandatory positional arguments:\
   selector\
   domain\
   privatekeyfile

optional arguments:\
   \-h, --help            show this help message and exit\
   \--hcanon {simple,relaxed}\
                         Header canonicalization algorithm: default=relaxed\
   \--bcanon {simple,relaxed}\
                         Body canonicalization algorithm: default=simple\
   \--signalg {rsa-sha256,ed25519-sha256,rsa-sha1}\
                         Signature algorithm: default=rsa-sha256\
   \--identity IDENTITY   Optional value for i= tag.

## AUTHORS

The original version of **dkimsign** was written by Greg Hewgill \<greg@hewgill.com\>.  It has been substantially rewritten by Scott Kitterman \<scott@kitterman.com\>.

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