DKIM (short for DomainKeys Identified Mail) is an email validation system designed to detect email spoofing. A digital signature is included with the message, and is validated by the recipient by using the signer’s public key published in the DNS. With DKIM, any emails sent through are reviewed by the receiving mail exchange and are marked as not being spam. Many of the large email providers, such as Yahoo and Gmail, use DKIM to validate their emails.
If you are using our email service, the following DKIM CNAME records are required:
Name Value
soverin1._domainkey soverin1._domainkey.extendcp.co.uk.
soverin2._domainkey soverin2._domainkey.extendcp.co.uk.
soverin3._domainkey soverin3._domainkey.extendcp.co.uk.
We also support DKIM records in CNAME and TXT format from other providers.
To prevent spoofing, we also offer SPF TXT records. You can read more in the following article:
How do I add SPF records to my site?
Article ID: 243
Created On: Fri, Mar 13, 2015 at 11:37 AM
Last Updated On: Wed, Jul 22, 2026 at 9:08 AM
Online URL: https://www.heartinternet.uk/support/article/what-is-dkim-and-can-i-send-emails-using-it.html