SPF None Result: What to Do When No SPF Record Exists

What SPF None Actually Means

When a receiving server checks your SPF record and gets none, it means:

1. It queried DNS for a TXT record at your domain
2. No SPF record was found
3. The server has no information about whether the sending IP is authorized

This is different from:

• Pass — IP is authorized
• Fail — IP is explicitly not authorized
• Softfail — IP is probably not authorized
• Permerror/Temperror — Couldn't evaluate the record

SPF none is the absence of any SPF policy. You're not saying "allow this sender" or "reject this sender" — you're saying nothing at all.

Why SPF None Hurts Deliverability

No Authentication Signal

Modern email security relies on SPF, DKIM, and DMARC working together. When SPF returns none:

• You lose one of three authentication signals
• Receiving servers have less confidence in your email
• You're more likely to land in spam, especially with new domains or IPs

DMARC Can't Use SPF

If you have a DMARC record but no SPF:

• DMARC alignment can only happen via DKIM
• You lose the SPF alignment path entirely
• If DKIM fails for any reason, DMARC fails

Spoofing Vulnerability

Without an SPF record, anyone can send email pretending to be from your domain. There's no mechanism for receiving servers to reject unauthorized senders.

Practitioner note: I audit domains daily where the owner says "we don't send much email" so they never set up SPF. Then I show them their DMARC reports with thousands of spoofed messages from random IPs in Russia. SPF none is an open invitation.

How to Check for SPF None

Using MXToolbox

1. Go to mxtoolbox.com/spf.aspx
2. Enter your domain
3. If result shows "No SPF record found" — you have SPF none

Using Command Line

dig TXT yourdomain.com

# Look for a record starting with "v=spf1"
# If none exists, SPF returns none

Using Google Admin Toolbox

1. Go to toolbox.googleapps.com/apps/dig/
2. Enter your domain
3. Select TXT record type
4. Look for SPF record in results

How to Fix SPF None

Step 1: Identify Your Authorized Senders

Make a list of every service that sends email as your domain:

Service Type	Examples
Primary email	Google Workspace, Microsoft 365
Marketing	Mailchimp, Klaviyo, ActiveCampaign
Transactional	SendGrid, Mailgun, Postmark
CRM	HubSpot, Salesforce
Other	Helpdesk, billing, forms

Step 2: Build Your SPF Record

Basic structure:

v=spf1 [includes for each sender] [all mechanism]

Example for Google Workspace:

v=spf1 include:_spf.google.com -all

Example for Google Workspace + SendGrid:

v=spf1 include:_spf.google.com include:sendgrid.net -all

Example for Microsoft 365:

v=spf1 include:spf.protection.outlook.com -all

Step 3: Add the DNS Record

Add a TXT record:

• Host/Name: @ (or leave blank, depending on registrar)
• Type: TXT
• Value: Your SPF record
• TTL: 3600 (1 hour) or default

Step 4: Verify

Wait for DNS propagation (usually minutes, sometimes hours), then check with MXToolbox to confirm the record is live.

Common Scenarios

"We Don't Send Email"

You still need an SPF record. Spammers love domains without SPF because nothing prevents spoofing.

Add:

v=spf1 -all

This says "no IP is authorized to send email as this domain." Receiving servers will reject spoofed messages.

"We Only Use Gmail/Outlook"

Add the appropriate include:

Gmail/Google Workspace:

v=spf1 include:_spf.google.com -all

Outlook/Microsoft 365:

v=spf1 include:spf.protection.outlook.com -all

"We Use Multiple Services"

Combine includes in one record:

v=spf1 include:_spf.google.com include:sendgrid.net include:mailgun.org -all

Watch the 10 DNS lookup limit — too many includes cause permerror.

"We Have Multiple Domains"

Each domain needs its own SPF record. The SPF record for company.com doesn't apply to company.co.uk.

Practitioner note: Agencies with multiple client domains often miss this. Every domain that sends email — even if it's just transactional from the website — needs SPF configured separately.

Softfail vs Hardfail

When creating your SPF record, you'll choose between:

• -all (hardfail) — Unauthorized IPs should be rejected
• ~all (softfail) — Unauthorized IPs should be marked suspicious but not rejected

Recommendation: Use -all if you're confident you've included all authorized senders. Use ~all temporarily while you audit and verify.

In practice, most major mailbox providers treat both similarly — they use SPF result as one signal among many rather than rejecting outright on hardfail.

SPF None vs Neutral (?all)

Some records end with ?all:

v=spf1 include:_spf.google.com ?all

This explicitly says "I make no assertion about IPs not listed." It's basically the same as none — you're opting out of SPF protection for unlisted senders.

Don't use ?all — it provides no security benefit. Use ~all or -all.

After Adding SPF

Once your SPF record is live:

1. Test authentication — Send emails and check headers for spf=pass
2. Set up DKIM — SPF alone isn't enough; configure DKIM for full authentication
3. Add DMARC — Start monitoring with DMARC at p=none
4. Monitor — Watch DMARC reports for SPF failures from legitimate senders you missed

If you're not sure which services send email for your domain or how to structure your SPF record correctly, schedule a consultation — I'll audit your sending and build the right record.

Sources

• RFC 7208: Sender Policy Framework (SPF)
• Google: Set up SPF
• Microsoft: Set up SPF for M365
• MXToolbox SPF Lookup

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v1.0 · March 2026