SOKOLOV SYSTEMS / RESOURCES
Resources & Blog
Guides and articles on email domain intelligence, DNS records, and provider identification.
Guide
October 5, 2026
How to Find the Email Provider Behind a Domain
A practical guide to identifying which mail service a domain uses by checking MX and SPF DNS records.
DNS Basics
October 5, 2026
What Is an MX Record?
A beginner-friendly explanation of Mail Exchange records and how they route email to the correct server.
Guide
October 5, 2026
How Email Domain Lookup Works
Understanding the DNS queries and record types that power email domain lookup tools.
Comparison
October 5, 2026
Google Workspace vs Microsoft 365 Email
How to tell whether a domain uses Google Workspace or Microsoft 365 by reading its DNS records.
Guide
October 5, 2026
How to Check the Email Provider of a Business Domain
Step-by-step instructions for identifying the mail provider behind any business domain.
DNS Basics
October 5, 2026
What DNS Records Tell You About an Email Domain
MX, SPF, DKIM, and DMARC explained — what each record reveals about email infrastructure.
Business
October 5, 2026
Understanding MX Records for Business Email
How businesses configure MX records and why they matter for email delivery and reliability.
Business
October 5, 2026
How Businesses Can Verify Their Email Infrastructure
A checklist for IT teams to audit and verify their organization's email DNS configuration.
Explore the Tools
Email Provider Filter
Bulk validate and sort emails by provider. Try it →
MX Record Checker
Learn how MX records work. Read more →
Domain Checker
What DNS records reveal. Read more →