MX Records Explained

What Is an MX Record

An MX record (Mail Exchanger Record) is a mail exchange record used to specify the mail server address for a domain. Only after the MX record is configured correctly can the domain send and receive emails normally.

Adding an MX Record

Host record:

• @ indicates the root domain (for example, example.com)

• www indicates www.example.com

• Other specific subdomains

Type: Select MX record

TTL: 600 seconds (recommended)

Value: Mail server address

Priority: If there are no special requirements, you can uniformly enter 1.

TTL

• TTL is the time-to-live of a DNS record in the cache of recursive DNS servers.

• The unit is seconds. A shorter TTL allows DNS changes to take effect faster; a longer TTL improves cache hit ratio and delivers more stable resolution speed.

• 600 seconds (10 minutes) is a common compromise value that balances flexibility and stability.

Priority

The higher the priority value, the higher the proportion of traffic it is assigned; this setting only takes effect among records of the same type.

Notes

1. The email MX record must be set accurately as required; incorrect settings will prevent it from taking effect.
2. Please check whether there are redundant MX records. A single domain can only be bound to one email service provider, so you must delete the MX record resolutions of other email service providers.