MX Record

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📬 What is an MX Record?

MX stands for Mail Exchange.
An MX record is a type of DNS (Domain Name System) record that tells the internet where to deliver email for your domain.

MX record is used to recieve emails form external doamin.

Control email FLOW

Load Balancing

Basically, it says:

"If someone sends an email to you@yourdomain.com, deliver it to this mail server."

🧭 Why is an MX Record Important?

Without an MX record:

  • Emails sent to your domain won't know where to go

  • Mail will bounce or get lost

With a correct MX record:

  • Emails are properly routed to your mail provider (like Microsoft 365, Gmail, etc.)

🔧 Example

If you're using Microsoft 365, your domain's MX record might look like:

vbnet
Type: MX  
Name: @  
Priority: 0  
Points to: yourdomain-com.mail.protection.outlook.com

This tells the world:

"Send all email for @yourdomain.com to Microsoft's mail servers."

🎯 Key Parts of an MX Record

ElementMeaning
NameThe domain (usually "@", meaning your main domain)
PriorityLower number = higher priority (used if you have multiple MX records)
Points toThe mail server responsible for receiving your email

🛡️ Bonus: Can MX Records Help with Security?

By themselves, no — but when combined with SPF, DKIM, and DMARC, they help make sure:

  • Emails come from real sources

  • Your domain isn’t used for spoofing

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