There's O365 email-only at $4 a month
There's hover.com (tucows) for basic email services. Much cheaper but you pay per year I believe. (not used their email service but I trust them and use them for DNS) https://www.hover.com/email
IMO O365 or Google Apps is the way to go unless you use none of the colab features or calendar/contacts, etc. in which any cheap email hoster out there will do (bluehost.com) if you just want IMAP but then you'll likely be dealing with more spam and issues.
You get what you pay for.