Zoho is ok... but is clunky, and they have slowly been removing useful features from their free plan (like IMAP support). They also limit the number of domains

Zoho is ok... but is clunky, and they have slowly been removing useful features from their free plan (like IMAP support). They also limit the number of domains on the account. But it is stable, and I haven't had any issues with email delivery or problems managing the calendar. I ended up paying for Google workspaces, because I wanted a unified view of all of my email and domains.