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A lot of place also block it due to Yandex being full of spam accounts, even on custom domains. Not sure I'd ever trust something from them and would actively block their services.

How is it better? as far as i know the other options are more feature rich

It offers IMAP and POP, which the Zoho free plan dropped some time back.

Their inbound spam filtering may also be better, given that they have more volume than Zoho to train on.

It is not free anymore.

Yeah, but:

a) a lot of places block Russia and China wholesale against spam

b) they'e hosted in a genocidal regime without rule of law completely beholden to a dictator's whims.

Pass.