What are A records, CNAME records, and MX records?

1. A Records (Address Records)

• What they do:
  An A record maps your domain name (like yourwebsite.com) directly to an IP address (like 123.45.67.89). This tells browsers exactly where to find your website on the internet.
• Example:
  If you set an A record for yourwebsite.com to 123.45.67.89, anyone who visits that domain will be sent to the server at that IP address.
• When to use:
  Use A records to point your main domain or subdomains directly to a web server’s IP address.

2. CNAME Records (Canonical Name Records)

• What they do:
  A CNAME record points a domain or subdomain to another domain name, instead of an IP address. It’s like saying, “This domain is really just an alias for another domain.”
• Example:
  If you want blog.yourwebsite.com to show your WordPress-hosted blog, you might set a CNAME for blog pointing to yourblog.wordpress.com.
• When to use:
  Use CNAME records to set up subdomains (like www, blog, or shop) that should follow another domain’s DNS settings.
  Note: You cannot use a CNAME for your root domain (e.g., yourwebsite.com), only for subdomains.

3. MX Records (Mail Exchange Records)

• What they do:
  An MX record tells the internet where to deliver email sent to your domain (like [email protected]). It assigns your domain’s email traffic to a specific mail server.
• Example:
  If you use Google Workspace for email, you’ll set MX records that point to Google’s mail servers.
• When to use:
  Use MX records to direct email for your domain to the right provider.
  You can have multiple MX records with different priorities for backup mail servers.

In a Nutshell:

• A Record:
  Connects a domain or subdomain to an IP address (for your website).
• CNAME Record:
  Connects a subdomain to another domain name (for aliases or redirects).
• MX Record:
  Tells email where to go (for your domain’s email addresses).