How to link corporate mail and mailgun?

Question

Mail server

Until recently, Yandex's "Mail for Domain" service was used for corporate mailboxes. And recently, they were puzzled by the question that if Yandex is also used as an SMTP server for corporate mailings, Yandex will not like it. Came to Mailgun. Everything is fine, everything suits, but there is one nuance that I have not yet been able to understand. Namely:
There are corporate mailboxes of the form [email protected] and mailings must also be conducted from the same domain, for example, from the mailbox [email protected] Both Yandex and mailgun need their servers to be registered in the MX domain. So the question is, how do you tie it all together?

Answer 1

a different domain is desirable for mailing lists, there is always a risk of spam