Exim/DKIM

DomainKeys Identified Mail (DKIM) is an email authentication method designed to detect email spoofing.

Initial Setup

 * Create an empty file at
 * Edit  and addundefined

Add Domain
First choose a selector. DKIM allows each domain to have multiple keys (to allow key rotation, multiple senders…). Each key is identified by a selector. For the example, we will use example2016.

Then create the key

Next step is to create a DNS record. The

Finally add a line to

Test
You can test your signatures server by sending a message to [mailto:check-auth@verifier.port25.com check-auth@verifier.port25.com]. See details page for advanced options.