SpamTitan

DKIM Authentication of Inbound Mail

DKIM (DomainKeys Identified Mail) is a method to validate the authenticity of email messages using public-key cryptography. Simply, it is a way to verify that an email sender is who they say they are. Its purpose is to prevent email spoofing.

DKIM is a development of 'DomainKeys' from Yahoo and 'Identified Internet Mail' from Cisco, hence the name DKIM.

Go to System Setup > Mail Authentication > DKIM Authentication to enable and configure DKIM authentication for inbound mail.

STG-dkim-authentication.jpg

Author Domain Signing Practices (ADSP) is an optional extension to DKIM authentication which allows for a domain to publish the signing practices it adopts when relaying mail on behalf of associated authors. Click Enable opposite Check Author Domain Signing Practices (ADSP): to enable this extension.

IP addresses and networks can allow DKIM authentication by adding them to the DKIM Bypassed IPs/Networks list.

  • To add a list entry, click Add... and the DKIM window displays. Using the table below as a reference, complete the fields. Click Save to save this entry.

  • To edit an existing entry, click the edit ST-701-edit-button.jpg icon in the Options column and the DKIM dialog box displays. Using the table below as a reference, edit the fields. Click Save to save changes.

  • To delete an entry, click the delete ST-701-delete-button.jpg icon in the Options column.

Field

Description

IP/Network:

Enter an individual IP address or network range to bypass DKIM checks

Netmask:

Select the netmask for the specified IP address. Individual IPv4 addresses will have a /32 (255.255.255.255) netmask.

Address Type:

IPv4 (default) or IPv6.

Comment:

Optional comment for this entry.