Multiple Address Records

Using several DNS MX record is sometime clumsy if you have many domains.

It is also possible to use one MX record per domain, but multiple address records:

example.com.              22879   IN      MX      10 mail.example.com.

mail.example.com.       22879   IN      A         1.2.3.4
mail.example.com.       22879   IN      A         1.2.3.5