Although I can't find any official announcement for this yet, it looks like Fastmail has quietly rolled out a change that will (finally!) allow you to have each of your users on a different plan in a multi-user account.
According to
Fastmail's Pricing Page:
Quote:
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You can build an account where you mix and match the plan level to each user. For example, you can build a Fastmail Family by adding additional Standard and Basic plans for adults and children.
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It also looks like users on the "Basic" plan can also now use custom domains as long as they're part of an account being managed by a Standard or Professional tier user...
Quote:
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If you have a Standard or Professional plan with your own domain, you can share a domain alias with any Basic users on your account.
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