Ad mail exchanger

A mail exchanger (MX) record is a type of DNS record that specifies the mail server responsible for accepting email messages on behalf of a domain name. Here's a breakdown of what an MX record is and how it works:

What is an MX record?

An MX record is a DNS record that maps a domain name to a mail server. It specifies the mail server that is responsible for accepting email messages sent to a particular domain name. The MX record is used by email servers to determine where to send email messages.

Format of an MX record

An MX record has the following format:

Preference Mail Server TTL

• Preference: A numerical value that indicates the priority of the mail server. Lower values indicate higher priority.
• Mail Server: The hostname or IP address of the mail server.
• TTL: The time to live of the record, which specifies how long the record is valid.

How does an MX record work?

Here's how an MX record works:

1. When an email is sent to a domain name, the sending email server looks up the MX record for that domain name in the DNS.
2. The MX record specifies the mail server responsible for accepting email messages for that domain name.
3. The sending email server sends the email message to the mail server specified in the MX record.
4. The mail server receives the email message and processes it according to its configuration.

Example of an MX record

Here's an example of an MX record:

10 mail.example.com. 3600

In this example:

• 10 is the preference value, indicating that this mail server has a higher priority than other mail servers.
• mail.example.com is the hostname of the mail server.
• 3600 is the TTL value, indicating that the record is valid for 1 hour.

Why are MX records important?

MX records are important because they ensure that email messages are delivered to the correct mail server for a domain name. Without an MX record, email messages may not be delivered correctly, or may be lost in transit.

How to set up an MX record

To set up an MX record, you need to create a DNS record with your domain registrar or DNS provider. The specific steps may vary depending on your DNS provider, but here are the general steps:

1. Log in to your DNS provider's control panel.
2. Create a new DNS record.
3. Select "MX" as the record type.
4. Enter the domain name for which you want to set up the MX record.
5. Enter the mail server hostname or IP address.
6. Enter the preference value (optional).
7. Enter the TTL value (optional).
8. Save the changes.

That's it! With an MX record set up, your domain name will be able to receive email messages correctly.