Is it possible to put multiple MX records?

Question

Domain Name System

For example, I will add MX records for Yandex and mailgun at once:
mx.yandex.net.
mxa.mailgun.org
mxb.mailgun.org
And what is priority? Yandex says to set priority 10

Answer 1

the smaller the number, the greater the priority, in fact, for this it was done.
And yes, in fact, this is done for redundancy and redundancy, so the answer to the second question is also yes