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SPF, DKIM and DMARC checker
Is your email going to spam? Enter your domain and we check its SPF, DKIM, DMARC and MX records and the site’s SSL certificate, and show whether you meet Gmail’s sender requirements.
Only public DNS records and the site certificate are read; the address is not stored.
Do your quotes reach the inbox?
A quote, invoice or booking email sent from a domain without authentication lands in the recipient’s spam folder, and nobody notices. Three DNS records remove that risk; set them up once and they keep working for years.
Check the thresholds for showing up in search with the website checker, and give your emails a consistent signature with the email signature generator.
Common questions
The most common reason is missing authentication. Receiving servers use SPF, DKIM and DMARC records to confirm that an email really comes from your domain; when they are missing or broken, the email looks suspicious. Since February 2024 Google has required SPF or DKIM from every sender, and all three from anyone sending more than 5,000 messages a day.
SPF is a DNS record listing the servers allowed to send email for your domain. It starts with v=spf1 and ends with all. A domain may have only one SPF record, and it may need no more than 10 DNS lookups; breaking either rule makes SPF fail.
DKIM is a digital signature added to every email you send; the receiving server checks it against a public key in your domain’s DNS and knows the message was not changed on the way. The key sits under a selector chosen by your email provider, for example google._domainkey.
DMARC tells receiving servers what to do with mail that fails SPF and DKIM, and sends you reports. p=none only monitors; it meets Gmail’s bulk sender rule but does not stop spoofing. Once reports show all your legitimate mail passing, move to quarantine or reject.
Open an email sent from your own domain and view the original message (Show original in Gmail). The s= value in the DKIM-Signature line is the selector. Enter it in the selector field.
In the panel where your domain’s DNS is managed: your domain registrar, your hosting company or a DNS service such as Cloudflare. Your email provider (Google Workspace, Microsoft 365 or your host’s email) gives you the value to enter.
LET'S TALK
Let’s review your domain, email and website set-up together.
On the first call we look at whether your quotes reach the customer’s inbox and whether your site comes across as trustworthy.
- Domain, accounts and source code in your name
- Scope and price in a written quote
- Design, development and ads with one contact