https://aws.amazon.com/workmail/ https://aws.amazon.com/workmail/ $4/user/month for a 50GB inbox multiple domains + multiple aliases that you can also send as

https://aws.amazon.com/workmail/ https://aws.amazon.com/workmail/ $4/user/month for a 50GB inbox multiple domains + multiple aliases that you can also send as; us-east, us-west, eu-west regions cheaper than fastmail, protonmail, tutanota, ...