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Email Deliverability CheckerCheck SPF, DKIM & DMARC in seconds

Enter your domain. We check your email setup and tell you what is wrong — and how to fix it — before your cold emails go to spam.

We find your DKIM key automatically from DNS. Only fill this in if you already know the key name.

Why these three checks matter

Gmail and Yahoo want SPF, DKIM, and DMARC set up. If they are missing, more of your emails go to spam.

1

SPF — Who can send

A list of servers allowed to send email for your domain. It stops strangers from faking your address.

2

DKIM — Email stamp

A digital stamp on each email. The inbox checks it to make sure the message was not changed.

3

DMARC — What if it fails

A rule for what inboxes should do when SPF or DKIM fails — like put the email in spam or block it.

Common questions

What is SPF, DKIM, and DMARC?

They are three checks that prove your emails are really from you. SPF says which servers can send for your domain. DKIM adds a digital stamp to each email. DMARC tells Gmail and Outlook what to do if a check fails. Together, they help your emails land in the inbox.

Why do I need SPF, DKIM, and DMARC?

Gmail, Yahoo, and Outlook expect these checks. Without them, your emails can go to spam, get slowed down, or get blocked. They also stop other people from sending fake emails that look like they came from you.

How does this tool work?

Type your domain name. We look up your email settings online, check if SPF, DKIM, and DMARC look correct, and show you what to fix in plain English.

What is a DKIM selector?

It is a short name for your DKIM key in DNS (like "google" or "selector1"). You do not need to enter it — we find it for you. If you know the name, you can type it in the optional field and we will check that one.

Why does my SPF record fail for too many lookups?

SPF can only look up about 10 other records. If you have too many "include" rules, the check fails. Fix it by combining rules or using fewer includes.

Is this tool free?

Yes. It is free. You do not need an account. Check any domain, see the results, copy the fixes, and share a link.