Daniel: /* Create a DKIM key for a domain */

2026-03-18T17:42:16Z

Create a DKIM key for a domain

Daniel: Created page with "==Create a DKIM key for a domain== Create a new folder and cd into it: mkdir -p /etc/opendkim/keys/mydomain.com cd /etc/opendkim/keys/mydomain.com Generate key: opendkim-genkey -r -d mydomain.com Delegate access to the opendkim user and group to access the key: chown opendkim:opendkim default.private Reference the key via OpenDKIM KeyTable: vi /etc/opendkim/KeyTable Add line to the file to define your selector. In this example, we will call the se..."

2026-03-18T17:41:24Z

Created page with "==Create a DKIM key for a domain== Create a new folder and cd into it: mkdir -p /etc/opendkim/keys/mydomain.com cd /etc/opendkim/keys/mydomain.com Generate key: opendkim-genkey -r -d mydomain.com Delegate access to the opendkim user and group to access the key: chown opendkim:opendkim default.private Reference the key via OpenDKIM KeyTable: vi /etc/opendkim/KeyTable Add line to the file to define your selector. In this example, we will call the se..."

New page

==Create a DKIM key for a domain==

Create a new folder and cd into it:

mkdir -p /etc/opendkim/keys/mydomain.com
cd /etc/opendkim/keys/mydomain.com

Generate key:

opendkim-genkey -r -d mydomain.com

Delegate access to the opendkim user and group to access the key:

chown opendkim:opendkim default.private

Reference the key via OpenDKIM KeyTable:

vi /etc/opendkim/KeyTable

Add line to the file to define your selector. In this example, we will call the selector default, but if your domain requires multiple DKIM keys, ensure you make this unique. You can modify the file by pressing i to enter insert mode in vi:

default._domainkey.mydomain.com mydomain.com:default:/etc/opendkim/keys/mydomain.com/default.private

Open the SigningTable file via vi

vi /etc/opendkim/SigningTable

Add the following line to the file by pressing i to enter insert mode (changing default if specified a different selector earlier on):

mydomain.com default._domainkey.mydomain.com

/etc/init.d/opendkim restart

Update DNS:

cat /etc/opendkim/keys/mydomain.com/default.txt

Create a new TXT record, name <code>default._domainkey</code> or <code>default._domainkey.subdomain</code> with the value between the quotes (don't include the quotes), e.g.:

v=DKIM1; h=sha256; k=rsa; s=email; p=ABCDEFG.....

← Older revision		Revision as of 17:42, 18 March 2026
Line 3:		Line 3:
	Create a new folder and cd into it:		Create a new folder and cd into it:

	mkdir -p /etc/opendkim/keys/mydomain.com		mkdir -p /etc/opendkim/keys/mydomain.com
	cd /etc/opendkim/keys/mydomain.com		cd /etc/opendkim/keys/mydomain.com

	Generate key:		Generate key:

	opendkim-genkey -r -d mydomain.com		opendkim-genkey -r -d mydomain.com

	Delegate access to the opendkim user and group to access the key:		Delegate access to the opendkim user and group to access the key:

	chown opendkim:opendkim default.private		chown opendkim:opendkim default.private

	Reference the key via OpenDKIM KeyTable:		Reference the key via OpenDKIM KeyTable:

	vi /etc/opendkim/KeyTable		vi /etc/opendkim/KeyTable

	Add line to the file to define your selector. In this example, we will call the selector default, but if your domain requires multiple DKIM keys, ensure you make this unique. You can modify the file by pressing i to enter insert mode in vi:		Add line to the file to define your selector. In this example, we will call the selector default, but if your domain requires multiple DKIM keys, ensure you make this unique. You can modify the file by pressing i to enter insert mode in vi:
Line 24:		Line 24:
	Open the SigningTable file via vi		Open the SigningTable file via vi

	vi /etc/opendkim/SigningTable		vi /etc/opendkim/SigningTable

	Add the following line to the file by pressing i to enter insert mode (changing default if specified a different selector earlier on):		Add the following line to the file by pressing i to enter insert mode (changing default if specified a different selector earlier on):
Line 30:		Line 30:
	mydomain.com default._domainkey.mydomain.com		mydomain.com default._domainkey.mydomain.com

	/etc/init.d/opendkim restart		/etc/init.d/opendkim restart

	Update DNS:		Update DNS:

	cat /etc/opendkim/keys/mydomain.com/default.txt		cat /etc/opendkim/keys/mydomain.com/default.txt

	Create a new TXT record, name <code>default._domainkey</code> or <code>default._domainkey.subdomain</code> with the value between the quotes (don't include the quotes), e.g.:		Create a new TXT record, name <code>default._domainkey</code> or <code>default._domainkey.subdomain</code> with the value between the quotes (don't include the quotes), e.g.:

	v=DKIM1; h=sha256; k=rsa; s=email; p=ABCDEFG.....		v=DKIM1; h=sha256; k=rsa; s=email; p=ABCDEFG.....

Dkim-add-domainkey - Revision history

Daniel: /* Create a DKIM key for a domain */