DomainKeys Identified Mail (DKIM) is a crucial standard that helps prevent spoofing of outgoing messages sent from your domain. Email spoofing occurs when the content of an email is altered to make it appear as if it came from a different source.
Why DKIM Matters
Spoofing is a common unauthorized use of email, and many email servers require DKIM to mitigate this risk. We recommend implementing DKIM alongside other security methods:
- Sender Policy Framework (SPF): SPF specifies which domains are authorized to send messages on behalf of your domain.
- Domain-based Message Authentication, Reporting & Conformance (DMARC): DMARC outlines how your domain should handle suspicious emails.
How DKIM Works
DKIM adds an encrypted signature to the header of all outgoing messages. Email servers receiving these signed messages can use DKIM to decrypt the message header, verifying that the message has not been altered after it was sent.
DKIM Signing Options
If you are using a SpamExperts service and your sending domains already sign with DKIM, you do not need to make any changes; SpamExperts will forward the DKIM-signed messages to the recipient as they are.
If DKIM signing is not in place, you have the option to sign the messages on your sending Mail Transfer Agent (MTA) or use SpamExperts for DKIM signing.
While signing with DKIM is not mandatory, it is highly recommended as it enhances the authentication of your email senders.
Additional Resources
For detailed instructions on how to set up DKIM with SpamExperts, visit DKIM Certificate Generation.
Gotchas to Avoid
- Ensure that DKIM is correctly configured on your sending MTA if you choose to sign emails yourself.
- Monitor your DKIM settings regularly to avoid any issues with email delivery and authentication.
