Google Workspace is my top recommendation for email hosting. A custom email powered by Gmail brings unmatched reliability, productivity, and spam filtering. The biggest drawback is the pricing at $6/month/user, but it is well worth the investment if you use email frequently.

Just purchased a domain and want to create a custom email address on a budget? Namecheap Business Email Hosting offers a high quality, reliable email experience with a web client and SMTP/IMAP capability.

If you want to keep your emails from prying eyes, using an encrypted mail provider is recommended. Proton Mail is well known for its end-to-end encryption with OpenPGP. You can get a custom email address with the Mail Plus plan.