Broad provider coverage

Detect common business, hosted, and consumer email infrastructure

Email Provider Checker Pro compares domain and mail-server signals with known provider patterns. When a provider cannot be identified confidently, the result remains unknown instead of being guessed.

Start With 500 Free Emails See How Detection Works

Provider categories

Organized coverage across major email-service types

The platform is designed to recognize known infrastructure patterns across enterprise suites, hosted-mail services, consumer platforms, gateways, and private servers.

Enterprise Email Suites

Common business email platforms used by companies, schools, and organizations.

Microsoft 365 Google Workspace Zoho Mail Amazon WorkMail Fastmail Proton Mail for Business

Hosted and Private Email

Hosted mailbox services and private-domain email environments.

cPanel Webmail Plesk Mail Rackspace Email Namecheap Private Email GoDaddy Email IONOS Mail

Consumer Email Services

Major personal email platforms recognized from their public mail infrastructure.

Gmail Outlook.com Yahoo Mail iCloud Mail AOL Mail GMX Mail

Security and Mail Gateways

Infrastructure that may sit in front of an organization’s underlying mailbox provider.

Mimecast Proofpoint Barracuda Cisco Secure Email Cloudflare Email Routing SpamTitan

Transactional and Sending Services

Sending infrastructure that may appear in SPF, routing, or domain-configuration records.

Amazon SES SendGrid Mailgun Postmark Elastic Email Brevo

Custom and Unknown Infrastructure

Private or uncommon mail servers are reported transparently when no confident provider match exists.

Custom MX Server Self-Hosted Mail Private Exchange Server Regional Hosting Provider Unrecognized Gateway Unknown Provider

Provider recognition depends on the infrastructure signals available for each domain. A provider name appearing on this page does not guarantee that every possible configuration can always be identified.

Detection signals

Provider classification uses more than the email address

The system examines available domain and mail-routing information before assigning a provider label. This helps distinguish branded domains from the infrastructure actually handling their email.

Email domain

MX hostnames

MX priority order

SPF include records

DMARC policy

Known provider signatures

Mail-security gateways

Historical mapping rules

Provider Detection Example

Example infrastructure result

High confidence

Domain example.com

MX Host example-com.mail.protection.outlook.com

Provider Microsoft 365

SPF Signal include:spf.protection.outlook.com

Gateway No separate gateway detected

Result Provider identified

Transparent results

Unknown providers remain unknown rather than being incorrectly labeled

Some organizations use private servers, uncommon hosting companies, proxy gateways, or configurations that hide the underlying mailbox provider. In those cases, the platform can preserve the available MX and DNS details without inventing a provider name.

Example Unknown Result

Infrastructure preserved for review

Unknown

MX Host

mail.private-example.net

Provider

Unknown Provider

Reason

No known provider signature matched

Confidence

Not assigned

Organized provider groups

Keep matching providers together

After classification, email addresses can be grouped by provider so users can review, filter, and export matching infrastructure together.

Microsoft 365 Group

4,826 emails

Addresses whose infrastructure matches recognized Microsoft-hosted patterns.

Google Workspace Group

3,914 emails

Business-domain addresses using recognized Google mail infrastructure.

Hosted Webmail Group

2,102 emails

Addresses using cPanel, Plesk, or other hosted private-domain mail services.

Unknown Provider Group

514 emails

Addresses preserved with available technical details when no confident match exists.

Analyze provider infrastructure with a free allowance

Start with 500 cumulative email checks, then select an available plan when you are ready for larger lists.

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