How to set up mail forwarding from a domain?

Question

Mail server

Good evening. There was a task to get hold of an infinite number of mailboxes and send letters from them to one of mine. This is necessary for registering accounts for clients, personal mail is not suitable, and not everyone can register a new mail, and teaching them is a lot of work.
A person tells me (he doesn’t know how it worked) that at his previous job, when registering, he entered any mail name on a specific domain ([email protected]) and a letter arrived with a confirmation to his mail. What services are there for this and can I set it up myself?

Answer 1

Good afternoon!
There is a setting in Mile ru for business and in Yandex Connect - the default mail to which all letters will be sent to non-existent domain addresses

Answer 2

I have been using the ImprovMX service for such tasks for a couple of years now . There is also a catch-all (when letters sent to non-existent addresses are redirected), but you can also add separate forwarders (it’s convenient, if some service is spamming, redirect letters from it to null).