Identify, validate and organize email addresses by their real mail provider.
The Email Provider Filter by Sokolov Systems identifies which mail provider handles email for any domain. By checking MX records and SPF signatures in DNS, the tool determines whether a domain uses Google Workspace, Microsoft 365, Zoho, ProtonMail, Yahoo, or another provider. This is useful for sales teams mapping email infrastructure, IT teams auditing domain configurations, and researchers studying email provider distribution.
Sokolov Systems develops software tools for legitimate business and email-domain intelligence purposes. Learn more about the company or read our guide on finding the email provider behind a domain.