The best protected email services have strong encryption to stop third parties out of seeing transmitted content and user information. Some also offer added features to improve reliability, such as two-factor authentication as well as ability to set up PGP, which adds another part of coverage. Other important factors to consider when choosing an email provider are the jurisdiction on the service (for example, where the data is physically stored) and if it supports SMTP or IMAP protocols.
Protonmail may be a free secure email installer that uses end-to-end encryption to protect your emails. It can be based in Swiss and conforms with Swiss privacy regulations. It offers portable applications with respect to Android and iOS as well as a world wide web application. In addition, it offers a paid variation with more storage space and features like email auto-responders. This is the option for organization email.
Posteo may be a secure email service that uses multiple methods to give protection to your mail in transportation, including TLS with Excellent Forward Secrecy and HTTP Strict Move you can try these out Security HSTS. It has a full suite of PGP integrations and offers two-factor authentication. It also has a built-in username and password manager and is audited by Cure53.
Zoho can be described as secure email service which offers both security in transit and security at rest to create your sales messages unreadable regardless if they are intercepted on the way to their destination or while becoming stored issues servers. Additionally, it has support for 2FA and other advanced features to enhance reliability, such as producing odd activity reviews. It is easy to work with and works across all devices.