How to bind Yandex mail to the internet.bs registrar domain?

Question

Email

There is a domain on internet.bs
, you need to configure mail pdd.yandex.ru
That is, create an MX record
Subdomain name: @
Record type: MX
Data: mx.yandex.net.
Priority: 10
Other registrars have always succeeded, but here it is somehow incomprehensible.
They sent the instructions
If you have your mail server at 1.2.3.4 and want
to point your MX records to this server, then to achieve this folow these steps.
1. login in your account
2. click on the domain name
3.Under advance option
4. click on DNS Management button
5. Expand the A records section
6. type "*" (without quotes) in the name field and 1.2.3.4 in the IPv4 Address field and
save
7. On the last row in the A Records section type "mail" (without quotes) and type 1.2.3.4
in the IPv4 Address field and save
8. Expand the MX Records section and leave the Name field empty and type
mail.domainname. com in the Exchanger field.
But I still do not understand what needs to be done)
Maybe someone faced such a task?

Answer 1

the instruction is not about that
but if they have
Expand the A records section
then don't they
Expand the MX records section ?