CloudEmail is described as 'Show you are in business and look professional with custom email at your company domain'. There are more than 50 alternatives to CloudEmail, not only websites but also apps for a variety of platforms, including Android, iPhone, Windows and iPad. The best alternative is ProtonMail, which is both free and Open Source. Other great sites and apps similar to CloudEmail are Gmail (Free), Tutanota (Freemium, Open Source), K-9 Mail (Free, Open Source) and Outlook.com (Freemium).
K-9 is an open source email client for Android with multi-folder sync, email signatures, Bcc-to-self, return-address configuration, keyboard shortcuts, Exchange Support, message flagging, IMAP deletes, saving attachments, configurable notifications and more.
FairEmail is a privacy-focused email client with a setup wizard that helpfully walks you through the steps to use it with any email provider. There are many privacy settings including encryption via OpenPGP and S/MIME and reformatted emails to avoid phishing.
Zoho Mail is a webmail service built with the needs of a modern business in mind. It provides features for business users to communicate effectively while catering to the customization and mailbox management needs of IT administrators.
mailbox.org offers a secure e-mail account for home and business use. The domain name, firstname.lastname@example.org, is easy to remember and can be understood anywhere in the world. They have been operating e-mail accounts for more than 20 years and are a highly reliable service provider.