Free or cheap email service for my domain?

Question

gmail

Greetings. I plan to use my domain to create mailboxes (4-8 pieces).
Yandex Mail for a domain, Mail.ru for business come to mind. Does Gmail have something similar? Anyone else? What is better, what is more reliable? Places need several gigabytes per box, ideally.
It is important that letters from my domain go to everyone, and incoming messages are intelligently filtered for spam, and also reach. Well, a good web interface.
A ready-made service is desirable - I can set up CommuniGate Pro on my server, but there is a free version for only 5 accounts, and I don’t really want to pay for hosting. :)

Answer 1

PDD from Yandex unambiguously pdd.yandex.ru

Answer 2

Good time of the day.
We have been using the services of Yandex mail for the domain for about 3 years.
Initially, the number of mailboxes was about 5, and at the moment it is about 18.
Spam filters perfectly, there are absolutely no complaints about outgoing messages.
Very user friendly customizable interface.

Answer 3

either mail from the host or pdd.yandex.ru