There are many cheap email hosting provider such as A2 Email Hosting ( Blazing Fast & Ultra-Reliable. ), Email Hosting Services by GreenGeeks and few more.
But, I recommend you to checkout Irist Professional Email Hosting that uses your domain and can be securely accessed via IMAP or POP3 and it is perfect alternative to Gmail for Domains (G Suite).
It is fast, secure and is supported by their 24/7 support team. Customer care consultants, available 24/7/365 >> Read More >>