Question 1

What are MX records?

Accepted Answer

MX (Mail Exchange) records are DNS entries that specify which mail servers are responsible for receiving email on behalf of a domain. When someone sends an email to user@example.com, their email server looks up the MX records for example.com to find where to deliver the message.

Question 2

What does MX priority mean?

Accepted Answer

MX priority (also called preference) is a number that determines the order in which mail servers should be tried. Lower numbers have higher priority. If the primary server (lowest priority number) is unavailable, email is routed to the next server with a higher number. This provides redundancy.

Question 3

Why do some domains have multiple MX records?

Accepted Answer

Multiple MX records provide failover and load distribution. If the primary mail server is down, sending servers will try the backup servers in order of priority. Large organizations often use multiple MX records for redundancy and reliability.

Question 4

How do MX records affect cold email deliverability?

Accepted Answer

MX records themselves don't directly affect sending deliverability, but they're part of your overall DNS health. For cold email, what matters most is that your sending domains have proper SPF, DKIM, and DMARC records — which ColdRelay configures automatically.

Question 5

Can I see what email provider a domain uses?

Accepted Answer

Yes! MX records reveal the email provider. For example, if MX records point to google.com servers, the domain uses Google Workspace. This tool automatically detects common providers including Google, Microsoft, Zoho, ProtonMail, and more.

MX Record Lookup

What Are MX Records?

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