Best Encrypt any email with CipherMail Alternatives in 2026

About Encrypt any email with CipherMail

Send and receive encrypted email messages using the S/MIME technology. CypherMail allows to exchange encrypted email messages. The encryption is S/MIME standard, the solution recommended by the security experts, and it is based on certificates. The certificates are generated on the fly when an email address is used. They are issued by an internal PKI that generated certificates with emailProtection key extended usage. The main CypherMail features are: - S/MIME 3.1 (X.509, RFC 3280) email encryption. - Compatible with existing S/MIME clients (like Outlook, Thunderbird etc.). - Certificates for S/MIME email encryption are automatically generated for each contact. - PKI included in the solution to issue the certificates. - Modern user interface, with drag’n’drop of files, progress bar for file uploading, browser notifications, embed images into messages, keyboard shortcuts, multi-language mails, .. - Both message and attachments are encrypted. - Text plain and HTML email support. Both formats are encrypted. - Contact management. - Autocompletion of e-mail addresses. - Token-based security engine is used for protection from CSRF attacks. - Supports the mail server protocols SMTP and IMAP. - Fully integrated with the offilive.com platform, that also allows to manage business email domains.