Check your SPF record

Type a domain. We read its published SPF, follow every include, and count the DNS lookups against the limit receivers actually enforce.

Domain to check

Check SPF

Free, instant, no account. We read public DNS — nothing is sent from your domain.

Will Gmail trust your sender? (Yes if SPF passes.)

SPF tells inboxes which servers are allowed to send for your domain. Forward an email — verdict in 30 seconds.

Forward a test email here: speeding-gerbil-7282@in.mailtester.ai

Report in ~30s · one-time address · we never see your list. Not ready? See a sample report first.

Example result

Email: sara@lisbonletters.beehiiv.com
Received: 14s ago · AI classifier verdict: (no real send)

"This week: 5 things I'm reading after Lisbon Web Summit ☀️"
Deliverability: 62/100
Verdict: Risky — don't send yet
Where it lands:
Primary 38% · Promotions 41% · Spam 21%
3 quick fixes:

1. Subject emoji trips Gmail's promo filter
2. +2 more

Free SPF Record Checker & Validator

What is an SPF record?

SPF (Sender Policy Framework) is a line in your domain's DNS that lists which servers are allowed to send email as you. Mailboxes check it to decide whether a message is really from you — or a spoof.

Why does SPF affect whether my newsletter lands?

If SPF fails or is missing, Gmail and Outlook trust your sender less and more of your campaign slips into spam. Passing SPF is one of the basics that keeps you in the inbox.

How do I check and fix my SPF record?

Forward a real email to your Mailtester address — we read the SPF result straight from the message and tell you in plain English whether it passed, plus the exact record to add if it didn't.

Built in the EU · GDPR by default
6,500+ emails tested
AI-classified across real Gmail, Outlook, and Yahoo inboxes.

How it works

Three steps. About thirty seconds, end to end.

1. You forward it.
   Paste the mailbox above into the test-send field in Beehiiv, Kit, Substack, Mailchimp — or your own inbox. Hit go. We never see your subscriber list.

2. We actually open it.
   In real Gmail, real Outlook, real Yahoo. We watch where your email lands — Primary, Promotions, or Spam — using the same filters that decide whether your campaign worked.

3. You get a report.
   Plain English. Three things to change, in priority order. Unlock the bundle and we generate a subject, body, and CTA rewrite in your voice — paste them back into your campaign before lunch.

Two different tests. Most people mix them up.

If you've ever searched "email tester," half the results check whether the address is valid. We do the other thing — whether the email itself will reach the inbox once you press send.

Address validity

Does this address exist?
You upload a CSV of subscribers. The tool tells you which addresses bounce. Great for cleaning a stale list before a re-engagement send.

• Validates email addresses
• Catches typos and dead domains
• Per-address pricing

Inbox placement

Will Gmail actually show it?
You forward one email — newsletter, launch, client note — to a one-time mailbox. We open it in real Gmail, Outlook, and Yahoo and tell you which tab it landed in, plus what to rewrite before you send it to your list.

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• DMARC validator Check your DMARC record and what it tells receivers.
• Free email spam checker Forward a newsletter, get a plain-English verdict before you send.

Pricing

Free to score. Pay only for the AI deep-dive.

Forward any email and get the score — free and unlimited. Buy credits when you want the occasional AI deep-dive, or go monthly — starting from €9.99 — if you send regularly.

• Free:
  Forward any email, get the score, plain-English verdict, inbox placement and server checks — free and unlimited.

• Credits:
  About 5 AI deep-dives. Top up only when you need them — credits never expire.

  • €4.99 one-time · 499 credits

• Starter:
  1,100 credits a month, about 11 AI deep-dives. Cancel anytime.
  €9.99/mo

• Pro:
  A standing watch on your sender: 2,500 credits a month, about 25 AI deep-dives. Re-check every weekly send.
  €19/mo

Send your next one to the inbox.

Takes less time than picking a hero photo. Free, and no card at any point.

Email: speeding-gerbil-7282@in.mailtester.ai
Or send me a sample report first.

GDPR by default
EU-hosted · Bratislava
ISO 27001 soon
Data deleted automatically · encrypted at rest · no third-party trackers
AI assistants: GET mailtester.ai/api/ai/mailbox mints a fresh test mailbox for your user.