- 42inc
 - Features secure standards-based SMTP, POP, IMAP, and Webmail. - 4SecureMail.com
- Provides secure email accounts and hosting for consumers and business customers worldwide.
- Agenetics, Inc.
- Allows users to send and receive secure messages.
- CipherTrust
- Enterprise email security including anti-spam and webmail protection.
- FileFortress
- Secure, web-based email system for businesses.
- Generalmail.com
- Premium secure service for business and personal use with encryption (SSL), web based email, and IMAP/POP3 access.
- HushMail
- Web-based fully encrypted email system.
- KeptPrivate.com
- Secure web-based email service offers encrypted message storage and secure POP/IMAP and SMTP access.
- MuteMail
- Allows users to send and receive anonymous email via an SSL connection.
- Nast-E-gram
- Service that anonymously sends specified messages to recipients as email or postal mail.
- Neomailbox Secure Email
- Secure anonymous email and Internet privacy services. SSL encrypted IMAP, SMTP, and POP3. Webmail access with PGP encryption and digital signature support. Unlimited disposable email addresses and multiple spam and virus defences.
- Proof of Service - electronic (PoS-e)
- Certified Internet document delivery system that provides proof of what was served, upon whom, and when.
- SafeMessage
- Provides protected communications by encrypting all communications, providing known delivery status, and auto-erasing messages.
- SecureNym
- Founded with the purpose of providing a private, anonymous email service.
- StealthMessage.com
- Secure messaging system designed for communicating sensitive and confidential information.
- Swissmail.org
- Offers secure email for business and personal use.
 VERIFY3
- Offers an email encryption, identity verification, and digital signatures system developed by Quadlogic Systems, which allows users to encrypt emails and attachments, such as accounts and databases.- Yozons
- Offers a secure service that allows businesses to securely send, legally sign, store, and retrieve documents and messages from anywhere in the world.
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