How do I configure SPF, DKIM and DMARC in SiteWorx? Print

In short: In SiteWorx, configure SPF, DKIM and DMARC under Administration > Mail Options. If DNS is hosted elsewhere, publish the generated records at that DNS provider instead.

Before changing records

• List every legitimate service that sends using the domain.
• Confirm where the authoritative DNS zone is hosted.
• Save the existing TXT records.
• Choose a mailbox or reporting service able to receive DMARC aggregate reports.

1. Configure SPF

1. Open Administration > Mail Options > SPF.
2. Select the domain and use the wizard or advanced interface.
3. Authorise only the systems that genuinely send for the domain.
4. Publish one combined SPF record and validate it.

2. Enable DKIM

1. Open Administration > Mail Options > DKIM.
2. Enable a key for the domain.
3. If SiteWorx is not authoritative for DNS, copy the complete selector record to the external DNS zone.
4. Send a test message and confirm that the receiving headers show dkim=pass.

3. Add DMARC

1. Open Administration > Mail Options > DMARC.
2. Begin with a monitoring policy such as p=none.
3. Configure aggregate reporting and use relaxed alignment unless there is a specific reason for strict alignment.
4. Review reports before increasing enforcement.

Test the result

Inspect the Authentication-Results header of messages sent to an independent provider. Check SPF, DKIM and DMARC separately and test every sending platform.

Official InterWorx guidance

• Manage SPF records
• Manage DKIM DomainKeys
• Manage DMARC records