CryptoMailer for Windows

Name: CryptoMailer
Rating: 3 (5 reviews)
Author: TheGreenBow

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Editors’ Review

Download.com staffFebruary 26, 2026

TheGreenBow CryptoMailer simplifies email encryption for secure communication. It integrates seamlessly with popular mail clients, allowing one-click encryption and decryption.

Top Recommended Alternative

PC Police Generation 2

Trial version

Pros
- One-click encryption and decryption
- Integrates with Thunderbird, Outlook, Windows Live Mail
- Compatible with all webmail services
- No size or number limits for emails
- No need to share secret keys with recipients
Cons
- Windows 8 support only mentioned for OS
- Version 4.x is obsolete

CryptoMailer for Windows

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Full Specifications

GENERAL

Release: July 11, 2014

Latest update: February 26, 2026

Version: 5.4

OPERATING SYSTEMS

Platform: Windows

Operating System

Windows 10
Windows XP
Windows 2003
Windows Vista
Windows 8
Windows 7
Windows Server

Additional Requirements: None

POPULARITY

Total Downloads: 3,826

Downloads Last Week: 1

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Program available in other languages

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Last Updated

User Reviews

3/5

5 User Votes

I dont speak French
ghostboy005August 24, 2006
Pros
Offers some good encryption tools.
Cons
NOT FREE! HArd to use if you dont speak french.
Summary
Only gives the illusion of encryption
January 10, 2004
Pros
Cons
Summary
Sure, it encrypts e-mail using your password as the "key." However, for the recipients to decode the message, you have to send them your password. If the user is encrypting mail to keep certain elements from being nosey, then sending the password through e-mail is like opening the henhouse door for the fox. The encryption strength is a puny 56-bit encryption--less than half the encryption strength of IE browser. Any hacker worth his salt can crack the code, especially since every recipient of the user's e-mail has to be given the password. If I know another user's password, then I can not only encrypt messages and pose as that user, I can intercept and decrypt his messages, too. PGP is STILL free, and it is STILL the best encryption program on the market. CryptoMailer only gives the illusion of security. It must be written by either Homeland Gestapo or by a hacker. Also, the free version will not allow the user to import another user's "key." Essentially, CryptoMailer is a useless sham.
Simple, easy and free!
November 29, 2003
Pros
Cons
Summary
This free version is simple to install and use and makes the 'art' of encryption less of a black art. Highly recomended!
It IS FREE !!!
November 26, 2003
Pros
Cons
Summary
If "Defender Of The Truth" had spared 30 secs. to read the INFO on the WEB, he'd found out that there are 2 versions of the product : A FREEWARE and a commercial version. The version at CNET is ABSOLUTELY free. Tried it, loved it, and I am using it every day. "Defender of the Truth" - don't tell lies !
Didn't try it. I don't like False Advertising.
November 7, 2003
Pros
Cons
Summary
It's not free. Go to the website and you find out it's a trial version. You must pay. Don't say free when it's not free!

Developer’s Description

By TheGreenBow

Encrypt your E-mail in one click without changing the way you work.

TheGreenBow CryptoMailer encrypts the e-mail you send to clients, colleagues in one click without having to share anything with them (secret key, password,..). CryptoMailer is automatically integrated in Thunderbird, Outlook, Windows Live Mail and it is fully compatible with all other mailers and webmails. It is as simple as install the software, add your e-mail address and click 'encrypt and send'. Features:

Strong integration with Thunderbird, Outlook, Windows Live Mail. One click to send an e-mail encrypted, and one click to decrypt received encrypted e-mails
Support of Windows 8 32/64-bit (see support for other OS)
Support of all Webmail like Gmail, Yahoo Mail
Read and send your e-mail as you always did before
No limit in size or number of e-mails you send
No need to know if your contacts already installed CryptoMailer
No need to create a dedicated e-mail address, keep yours
No need to exchange a secret passphrase, CryptoMailer does it for you
Ability to setup multiple e-mail addresses (office, personal)
Ability to create rules to force encryption to some of your contacts.
Unrestricted ability to add large documents, add recipients, add images like you would do for non encrypted e-mail

Version 4.x is obsolete.

CryptoMailer for Windows

Editors’ Review

Top Recommended Alternative

PC Police Generation 2

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Cons

CryptoMailer for Windows

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User Reviews

I dont speak French

Only gives the illusion of encryption

Simple, easy and free!

It IS FREE !!!

Didn't try it. I don't like False Advertising.

Developer’s Description