The Lookup That Shows a Domain's Whole Mail Setup.

A mail domain lookup takes a single domain and reads back its mail configuration: the provider behind it, its MX records in priority order, and whether the domain can receive mail at all. Verifox returns that snapshot in under two seconds.

Where a raw record lookup makes you read hostnames, a mail domain lookup answers the orienting question first, who handles this domain’s mail and is it configured. It is the same DNS resolution our verification engine performs before it ever touches a mailbox.

Paste the domain into the lookup above and read the result. The mail server, or servers, for a domain live in its MX records, and Verifox lists them in priority order along with the provider behind them. No account, no install.

You can also run nslookup -type=mx example.com or dig example.com MX in a terminal, but those return raw hostnames to decode. Configuring a mail client? The IMAP and SMTP settings page reads those out directly.

The mail provider is written into a domain’s MX hostnames, and a mail domain lookup reads it for you. Hosts ending in aspmx.l.google.com mean Google Workspace, mail.protection.outlook.com means Microsoft 365, and a custom hostname usually points to a self-hosted or niche provider.

Verifox names that provider in plain English rather than leaving you to recognise the hostnames, which is the fastest way to learn who hosts a domain’s email before you reach out to it or add it to a sending list.

Three things at a domain level. First, who runs the mail, the provider behind the MX records. Second, how mail routes, the MX records in priority order, with the primary server and its fallbacks. Third, whether mail is accepted, a domain with no MX record cannot receive email at all.

To confirm a specific address is actually reachable, the mailbox itself has to be checked - a step no domain-level lookup can do. The domain lookup tells you mail can land; the mailbox check tells you this exact inbox will.

Usually one of two reasons shows up in a mail domain lookup: the domain publishes no MX records, so there is nowhere for mail to land, or the domain itself does not resolve, a typo, an expired registration, or a DNS misconfiguration. Either way, mail sent to it will bounce.

Some domains intentionally route mail without MX records, but for most, a missing MX means mail bounces. If the MX looks right but mail still fails, an SMTP test confirms the mail server answers, and an authentication check covers SPF, DKIM, and DMARC.

They overlap, but a mail domain lookup is the broader of the two. A raw MX lookup returns the hosts and priorities. A mail domain lookup wraps that in a provider name and a yes-or-no on whether the domain can receive mail.

Think overview versus detail. Start here to learn who runs the mail and whether it accepts it, then go to the MX page for each record, or the SPF, DKIM, and DMARC page for the authentication layer.

Yes. The single lookup above is free with no account. For a list of domains, the REST API returns the MX records and the detected provider for each one, so you can run a bulk mail domain lookup across a whole list programmatically.

Bulk lookups run on the same pay-as-you-go credits as the rest of the platform, localized to your region, and those credits never expire. One credit covers a single domain lookup.

No, and the difference matters. A mail domain lookup checks the domain, can it receive mail at all and who runs it. Confirming an email checks the specific mailbox, does [email protected] actually exist and accept mail.

A domain can have a flawless mail setup while a given address on it is dead. The domain lookup is step one; the free email checker is step two, and Verifox runs both on the same engine.

Completely. A domain's mail configuration is public DNS data - the same answers any resolver returns - so the domain owner is never notified. On our side, the domain is resolved in memory and gone the instant the result renders.

That handling sits inside Verifox’s SOC 2 Type II controls and GDPR posture, and the privacy policy spells out exactly what we touch and what we never keep.

Yes. The REST API reference documents a lookup endpoint that returns the MX records and the detected provider for any domain, so you can wire domain mail lookups into your CRM, your onboarding flow, or any tool that speaks REST.

Verifox also ships native MCP server support, so AI agents (Claude, Cursor, custom LLM apps) can look up a domain’s mail setup and verify addresses without glue code. Live uptime and incident history are at status.verifox.ai.