I had been looking into alternative mailbox services where you can use your own domain. Gandi went from free with your domain to costing about €60 yearly and is now about the most expensive I can find. Proton Mail is around €50, Tuta around €40. The latter is for three domains, the others cost that amount per domain. Several others seem to be between those numbers, and then there is disroot's not very confidence inducing "12 coffees".

Anyone know a mailbox service (imap or app, own domain) that beats Tuta's pricing of €3/month?

(Some prices rounded up to nearest round number so I can remember them)