Fundamentals

Understanding MX records, mail servers, and how email routing works.

Not Receiving Emails? How to Diagnose and Fix Email Delivery Issues

Step-by-step guide to diagnosing why you're not receiving emails across Gmail, Outlook, and Yahoo. Start with MX records and work through every possible cause.

How to Check MX Records: A Step-by-Step Guide

Learn how to check MX records for any domain using our free lookup tool. Understand the results and troubleshoot common mail server issues.

Can You Have Multiple MX Records? Understanding Mail Server Redundancy

Learn why domains use multiple MX records, how priorities work, and best practices for mail server redundancy and failover.

How to Set Up a Backup MX Server for Email Redundancy

Learn how backup MX servers protect email delivery, how to configure primary and secondary MX records, and when you actually need email redundancy.

MX Record Not Found: What It Means and How to Fix It

What to do when a domain has no MX records. Understand the causes, the impact on email delivery, and how to fix missing MX records at your registrar.

MX Record Priority Explained: How Mail Server Preference Works

Learn what MX record priority numbers mean, how mail servers use them for failover, and how to configure primary and backup mail servers correctly.

How Long Do MX Records Take to Propagate? DNS Timing Explained

Understand MX record propagation times, why changes don't take effect immediately, and how to speed up the process during email migrations.

MX Record Lookup Timeout: What It Means and How to Fix It

What causes MX lookup timeouts, how they affect email delivery, and step-by-step instructions to diagnose and resolve DNS timeout issues.

What TTL to Set on MX Records and Why It Matters

Learn what TTL means for MX records, the recommended values for stable vs. migration scenarios, and how to change TTL at your DNS provider.

How to Preserve MX Records When Transferring a Domain Between Registrars

What happens to your MX records during a domain transfer, how to prevent email disruption, and the steps to verify everything works afterward.

MX Records and Email Security: How SPF, DKIM, and DMARC Work Together

Learn how MX records relate to SPF, DKIM, and DMARC, why you need all of them, and common misconceptions about email security DNS records.

Changing Email Providers: How to Update MX Records With Zero Downtime

Step-by-step guide to updating MX records when switching email providers, with tips to avoid downtime and lost email during migration.

MX Records Explained: Priority, Structure, and Best Practices

A deep dive into MX record structure, priority values, TTL settings, and how mail exchanger records compare to other DNS record types.

Setting Up MX Records on a Subdomain for Separate Email Routing

Learn how to configure MX records on a subdomain to route email separately from your main domain — ideal for departments or multiple providers.

MX Records vs A Records: What's the Difference for Email?

Learn the difference between MX records and A records, why email needs both, and how to check your configuration is correct.

Null MX Records: How to Stop a Domain From Receiving Email

Learn what a Null MX record is, how to configure one per RFC 7505, and when to use it for domains that should never receive email.

What is an MX Record? A Simple Guide to Mail Exchanger Records

Learn what MX records are, how they direct email to your mail servers, and why they're essential for receiving email at your domain.

What is an MX Server? Understanding Mail Servers and MX Records

Learn the difference between MX servers and MX records, how mail servers process incoming email, and common MX server configurations.

Who is My Email Provider? How to Identify Your Email Service from MX Records

Learn how to identify your email provider by checking MX records. Recognize common patterns for Google, Microsoft, and other email services.