How to Set Up DMARC, SPF, and DKIM on DreamHost

Quick Takeaways

• DMARC, SPF, and DKIM protect your domain from spoofing, phishing, and unauthorized use.
• Use Palisade’s DMARC Generator to create a valid record with the right policy and reporting address.
• Add a TXT record named _dmarc.yourdomain.com in DreamHost, under your DNS settings.
• Make sure SPF includes netblocks.dreamhost.com and any third‑party senders.
• DKIM is automatically published by DreamHost; confirm it with Palisade’s DKIM Lookup.
• Allow up to 72 hours for DMARC reports to appear.
• Regularly monitor and improve your configuration with Palisade’s Email Security Score dashboard.

Frequently Asked Questions

What is DMARC and why do I need it?

DMARC (Domain‑based Message Authentication, Reporting & Conformance) tells receiving mail servers how to handle unauthenticated mail from your domain. It reduces phishing and spoofing by providing clear policies and reporting. Implementing DMARC with Palisade’s Email Security Score gives you visibility into abuse attempts.

By adding a DMARC record, you:

• Protect customers and partners from phishing attacks
• Prevent cybercriminal from using your domain name and pretending to be you
• Receive detailed reports showing who is sending on your behalf
• Improve deliverability and trust in your email campaigns

How can I confirm my DMARC record is active?

After saving, use Palisade’s DMARC Email Security Score. It will query your DNS and show the exact record, confirming there are no typos.

What does the SPF record look like for DreamHost?

DreamHost’s default SPF includes its mail servers. Typically, DreamHost expects to have the following SPF record:

v=spf1 include:netblocks.dreamhost.com ~all

If you use other services (e.g., a marketing platform), add their include statements to the same TXT record. Verify the combined record with Palisade’s SPF Lookup tool.

Can I have multiple SPF records?

No. Multiple SPF TXT records cause a “PermError” and break validation. Consolidate all authorized senders into a single record.

How is DKIM handled on DreamHost?

DreamHost automatically creates DKIM keys for your domain. The public key appears as a TXT record named dreamhost._domainkey.yourdomain.com. Use Palisade’s DKIM Lookup to verify the key matches the selector used by your mail service.

Do I need to configure BIMI as well?

No. Configuring BIMI (Brand Indicators for Message Identification) displays your logo next to authenticated messages, but is optional. After DMARC is in “quarantine” or “reject” mode, upload your SVG logo via Palisade’s BIMI tool and add the BIMI TXT record.

How long before I see DMARC reports?

Most mailbox providers send DMARC aggregate reports once per day.After initial DNS propagation, allow 24–72 hours for reports to populate in Palisade’s dashboard, where you’ll see who’s sending from your domain and whether those messages are passing SPF and DKIM checks.

What should I do if I see authentication failures?

Review the failure details in the DMARC report. Common issues include missing include statements in SPF or outdated DKIM selectors.

Common causes include:

• Missing include: entries for third-party senders in your SPF record,
• DKIM selectors that have rotated or expired,
• Misaligned “From” domains when sending through marketing platforms.

Fix the corresponding DNS entries and retest with Palisade’s validation tools until all senders align properly.

Is there a quick way to audit my whole email authentication setup?

Yes. Palisade’s Email Security Score runs a full check of DMARC, SPF, DKIM, and BIMI, giving you a single health rating and remediation steps.

Do I need to repeat these steps for each subdomain?

Each subdomain that sends email should have its own DMARC, SPF, and DKIM records, or you can use a wildcard DNS entry. The same Palisade tools work for any subdomain you enter.

Step‑by‑Step Guide

1. Verify your DMARC entry

Run the DMARC Lookup tool to ensure the record is published correctly. Make any changes that might be needed.

2. Check SPF configuration

Use Palisade’s SPF Lookup to confirm the record includes netblocks.dreamhost.com and any third‑party services.

3. Confirm DKIM keys

Run the DKIM Lookup for your selector (e.g., dreamhost._domainkey.yourdomain.com) and verify the public key matches DreamHost’s output.

4. Monitor reports

Give DNS up to 72 hours to propagate, then log into Palisade’s dashboard to view DMARC aggregate reports and take corrective action as needed.

By following these steps, you’ll secure outbound mail from DreamHost, protect your brand, and gain visibility into any abuse attempts.