Hi,

It's been told very hundred times but a plan between Free and Paid allowing one account to be used with own domain for a more affordable price. And second feature I'd ask would be Swiss hosted (aka government doesn't ask handing over of data too easy) hardened classic email service because not every account in a website needs utmost privacy since communicates with regular emails mostly. (for example a customer service email). And using IMAP and SMTP would be plus for these accounts.