MX Records

Mail Exchange Records (MX) contain a list of mail exchange servers that are to be used for the domain.

 

Multiple Non-Null MX records are allowed with the same domain/host name. There can only be one Null MX record with same domain/host name. Adding a Null MX record on a domain/host that already has an existing MX Record triggers an error.

 

An MX record consists of the following four fields:

• Host - The domain name of your mail recipient’s email addresses (that is, the portion after the @ symbol in the email address).

• Null MX Record – Selecting the checkbox to enable a Null MX Record indicates that the domain does not accept email. Indicated a Null MX Record for a domain prevents any additional MX Records from being created.

  • If you select to enable the Null MX Record, the Goes To field will pre-populate with a “. “ (period), and the Pref field will pre-populate with a 0 (zero). These values cannot be changed.

• Goes To - The FQDN of the mail host. The host must have a valid IP address and cannot point to a CNAME (alias).

• Pref - A preference integer value between 0–999 that indicates which mailer to use. The preference value is only relevant in comparison to other MX records' values. Lower values have higher priority.

• TTL - The Time to Live (TTL) for the record. You can provide this value as either an integer or an annotated value (1h = 1 hour).

  • This field is not required, and will be set to the default value if left empty.