Enter your business email or website. In about ten seconds you’ll see whether Gmail and Outlook trust your mail, whether someone could send email pretending to be you — and exactly what to change.
Free, no sign-up. We read only your domain’s public DNS settings — nothing is sent to your inbox and no mail is read.
Example result
yourbusiness.com
1/3
Anyone can send email pretending to be yourbusiness.com.
Good Will Gmail and Outlook trust your email?
Fix this Can someone pretend to be you?
Needs work Ready to send newsletters and invoices?
Fix plan · 2 stepsv=DMARC1; p=quarantine; rua=mailto:…
What you’ll get
Three plain answers. Will Gmail and Outlook trust your mail? Can someone pretend to be you? Are you ready to send newsletters and invoices?
A fix plan for your setup. We recognise your email provider and where your DNS lives, and give you the exact records to add — and where to click.
Something to forward. Share the live check, save it as a PDF, or have the plan emailed to you for whoever manages your website.
Want to see one first? Check psychevus.com — yes, ours has something to fix too.
Why business emails go to spam — in plain words
Inboxes now check who you are
Gmail requires every sender to pass SPF or DKIM, and anyone sending around 5,000 messages a day to Gmail must also publish DMARC. Yahoo applies the same rules, and since May 2025 Outlook.com rejects failing high-volume mail with error 550 5.7.515. Mail that can’t prove where it comes from is the first to land in spam.
The three records, without jargon
SPF is a guest list: the servers allowed to send email for your domain. DKIM is a wax seal: a signature showing the message wasn’t forged or changed. DMARC is the instruction to inboxes: what to do with mail that fails both — deliver, send to spam, or refuse.
Why it matters beyond spam
Without a DMARC policy that quarantines or rejects, anyone can send an email that appears to come from your business — a fake invoice to your customers, a payment request to your bookkeeper. Getting this right protects the people who trust your name.
What this check can’t see
Authentication is necessary, not sufficient. Your sending reputation, complaint rate, list quality and message content also matter, and only the mailbox providers see those. The check looks for DKIM under the names providers commonly use; a key published under an unusual name may not be found.
The most common technical reason is missing or broken authentication: Gmail requires every sender to pass SPF or DKIM, and bulk senders also need DMARC. Mail that can’t prove where it comes from is the first to be filtered. Reputation, complaints and content matter too, but authentication comes first.
What are SPF, DKIM and DMARC, in plain words?
SPF is a guest list of servers allowed to send email for your domain. DKIM is a tamper-proof seal on every message. DMARC is your instruction to inboxes about mail that fails both: deliver it, send it to spam, or refuse it.
Do small businesses need DMARC?
Yes, if you want to stop others sending email in your name. Without a DMARC policy of quarantine or reject, anyone can send a fake invoice or payment request that appears to come from your domain.
Is DMARC p=none enough?
It satisfies the Gmail, Yahoo and Outlook sender requirements, but it doesn’t protect you: p=none only asks for reports, so forged mail is still delivered. Move to p=quarantine once your own services pass SPF and DKIM.
What does error 550 5.7.515 mean?
Outlook.com rejected your message because your sending domain didn’t meet its authentication level — SPF, DKIM and an aligned DMARC record of at least p=none. Fix whichever of the three fails.
How long do DNS changes take?
Usually minutes to an hour, occasionally up to 48 hours, depending on your DNS host and the record’s time-to-live. Run the check again after you change a record.
Why can’t the check find my DKIM key?
DKIM keys live under a name chosen by your email provider (a “selector”). The check tries the names providers commonly use. If your provider uses an unusual one, the key may exist but not be found; if you never turned DKIM on, it isn’t there.
Does this tool read my email or store my domain?
No. It reads only your domain’s public DNS records — the same records every mail server reads. No mailbox is accessed, and checks are counted only as daily totals without the domain.
Let’s make a connection.
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