To be competitive with with the Germans: posteo, tutanota and mailbox org there should be a 1 EUR plan. Your cheapest plan is 4 EUR which is insane. You have more features, but you could make that offerer by scaling the costly features down (storage, traffic).
I could need:

1-5 GB
No VPN (it doesn't make sense to have the VPN with the same provider for me, I would never use this, because ist enables you to Tracks me)
No drive
1 custom domain Roth catch all
1-5 addresses for sending