Email provider checker

What's actually handling the mail?

Type a domain or email address to find out who your email provider is. We'll check which service runs its mail — Google, Microsoft, Proton, Apple, and 160+ others.

Guide

How to find out who your email provider is

Every domain that can receive email advertises its mail servers in public DNS through MX (Mail Exchange) records. Reading those records tells you which email service provider a domain uses — no login or password required. Here is how to check it:

  1. Take the domain you want to look up — for an email address, that is everything after the @.
  2. Enter it in the checker at the top of this page and press Check.
  3. The tool resolves the domain's MX records over DNS and matches them against 160+ known providers.
  4. You get the provider name, its category — mailbox, gateway, forwarder, or relay — and the raw MX records as evidence.

FAQ

Checking email providers — common questions

How do I find out who my email provider is?

Enter your domain or email address — everything after the @ — in the checker at the top of this page. It reads the domain's public MX records over DNS and matches them against 160+ known services, so you instantly see whether Google Workspace, Microsoft 365, Proton, Fastmail, a security gateway, or something else is handling the mail.

How can I check the email service provider for any domain?

Type the domain into the form above and press Check. Every domain that receives email publishes MX (Mail Exchange) records in DNS, and this email provider checker resolves them and names the service behind them. It works for any domain, not just your own — handy for vetting a customer, vendor, or competitor.

Can I find my email provider without logging in anywhere?

Yes. The lookup uses only public DNS records, so you never sign in or share a password — you just need the domain name. That is also why it can identify the provider for a domain you don't control.

What is an email service provider?

An email service provider is the company that runs the mail servers for a domain, where messages are received and inboxes live. Common providers are Google Workspace and Microsoft 365 for business, and Gmail, Yahoo, iCloud, and Proton for personal mail. A domain can also route mail through a security gateway or forwarder that sits in front of the real provider.

Why does the checker sometimes show a gateway or forwarder instead of a mailbox?

Some domains point their MX records at a spam-filtering gateway (such as Proofpoint or Mimecast) or at a forwarding service rather than at the final mailbox. In those cases the MX records reveal the relay, and the real mailbox provider can be hidden behind it. The report labels this so you know exactly what you are looking at.