List of supported email software

CryptoMailer offers a deep integration (one click to encrypt, one click to decrypt,..) with the following email software:

  • Thunderbird 3.2 and further - All languages
  • Outlook 2003, 2007, 2010 32-64bit, 2013 (latest SP) - Languages: FR, EN, DE, IT, SP, PT, BR
  • Windows Live Mail 2009, 2011, 2012 - All languages
  • Outlook Exchange
  • Apple Mail

All webmail like Gmail, Yahoo mail, ... are also supported with a bit less integration with CryptoMailer.

List of supported OS

CryptoMailer is supported on the following Operating Systems:

  • Windows XP 32-bit
  • Windows Vista 32/64-bit
  • Windows 7 32/64-bit
  • Windows 8 32/64-bit
  • Windows 8.1 32/64-bit
  • Windows 10 32/64-bit
  • iPhone iOS 7/8/9
  • Android 4.0 and further
  • OSX 10.10
  • OSX 10.11
  • macOS 10.12
List of supported webmail

You can send and receive encrypted emails with all webmail, using the CryptoMailer webmail encryption plugin. This includes Gmail, Yahoo Mail, etc.

List of supported languages?

CryptoMailer is available in the following languages:

  • Arabic
  • Deutsch
  • English
  • Farsi
  • French
  • Portuguese
How to read an encrypted email I just received, while CryptoMailer is not yet installed?

Simply download and install CryptoMailer if not done yet, and create a CryptoMailer account with the email address with which the email was received. It will be then possible to read emails that came in even before the registration of this email address.

How to read an encrypted email I just received, while I have not created a CryptoMailer account yet

Once CryptoMailer has been downloaded and installed, you need to create a CryptoMailer account with the email address with which the email was received. It will be then possible to read emails that came in even before the registration of this email address.

Can I view the encrypted emails that I have received while I am not connected to the internet

Yes, it is possible to read received emails at any time, providing that it is logged into the right CryptoMailer account

Can I prepare an encrypted email to be sent later when I am not connected to the internet?

Yes, if at least one encrypted email has been sent to the same recipient in the past. CryptoMailer would then have kept the necessary key for this contact.

How to send an encrypted email with webmail?
  • Connect to one of your CryptoMailer account (email address you want to send from) by entering your password.
  • Click on your account name, and click on the 'Prepare an encrypted email' button. You can also use shortcuts (on desktop or on 'Programs' > 'TheGreenBow' > 'CryptoMailer' > 'Prepare an encrypted email')
  • Write your email in the webmail encryption plugin, add attachments to be encrypted, insert the recipient's email addresses, then click the 'Encrypt' button.
  • To send it, open your webmail, and attach the file 'xxxx.cml' which have been created on your 'My Documents' folder.

Note: The 'file.cml' file should not be renamed, not be sent with another attachment.

How to read an encrypted email received with webmail?

Find the attachment file called 'file.cml' and open it with a simple double click. All email body and other encrypted original email attachments will be available.

I have received an encrypted email only containing an attachment called 'winmail.dat' that I cannot read.

The encrypted file you need is stored inside the 'winmail.dat' file.

On the recipient side: in order to open the winmail.dat file, you must use Outlook, or download and install a third party application that will allow you to open this file. See our recommendations below. For more information on this topic:
http://download.cnet.com/Winmail-Opener/3000-2369_4-10469892.html (English)
http://www.zebulon.fr/astuces/268-comment-ouvrir-un-fichier-winmail-dat.html (french)

I do not see the 'Encrypt' button nor the 'CryptoMailer' button in Thunderbird

Follow the steps:

  • Click on the 'Alt' key to display the menu, then go to the 'Tools' > 'Add-ons' menu.
  • Select 'Extensions' in the list on the left. CryptoMailer must be listed. If disabled, click on the 'Activate' button.
I do not see the 'encrypt' button nor the 'CryptoMailer' button in Outlook 2010/2013

Follow the steps:

  • Go to 'File' > 'Options' menu
  • Click on 'Add-ins'
  • In the 'Manage' dropdown menu at the bottom of the window, select 'Disabled Items'
  • Click on 'Go'
  • If CryptoMailer is listed, select it and click on 'Enable', then 'Close'

If the CryptoMailer button does not appear yet,

  • Go to 'File' > 'Options' menu
  • Click on 'Add-ins'
  • In the 'Manage' dropdown menu at the bottom of the window, select 'COM Add-Ins'
  • Click on 'Go'
  • In the opening window check 'CryptoMailer'
  • Click on 'Ok'
I do not see the 'encrypt' button nor the 'CryptoMailer' button in Outlook 2007

Follow the steps:

  • Go to 'Tools' > 'Trust Center...'
  • Select 'Add-ins' in the list on the left
  • In the 'Manage' dropdown menu at the bottom of the window, select 'Disabled Items'
  • Click on 'Go'
  • If CryptoMailer is listed, select it and click on 'Enable' and then 'Close'

If the CryptoMailer button does not appear yet:

  • Go to 'Tools' > 'Trust Center...'
  • Select 'Add-ins' in the list on the left
  • In the 'Manage' dropdown menu at the bottom of the window, select 'COM Add-Ins'
  • Click on 'Go'
  • In the opening window check 'CryptoMailer'
  • Click on 'Ok'
I do not see the 'encrypt' button nor the 'CryptoMailer' button in Outlook 2003

Follow the steps:

  • Go to the menu '?' > 'About Microsoft Office Outlook'
  • Click on 'Disabled Items'
  • If CryptoMailer is listed, select it and click 'Enable' and then 'Close'

if the CryptoMailer button still doesn't appear,

  • Go to 'Tools' > 'Options' menu
  • Go to 'Other' tab
  • Click on 'Advanced Options'
  • Click on 'COM Add-Ins'
  • In the opening window, check 'CryptoMailer'
  • Click on 'OK'
CryptoMailer is telling me it cannot run when Word is used as email editor. Which options should I change?

A message appears indicating that CryptoMailer cannot run when Word is used as email editor under Outlook 2003.
To change the options:

  • Go to 'Tools' > 'Options' menu
  • Go to 'mail format' tab
  • Uncheck 'Use Microsoft Office Word 2003 to edit email messages'. Outlook will use its internal editor to write emails instead of Word. There is no noticeable impact using this option.
I can read an email while I'm not logged to the recipient's CryptoMailer account, but to the sender's one. Can it be possible?

It is normal. The sender of an encrypted email is also considered as a recipient by CryptoMailer (in order to decrypt the emails he has sent).

My email software is not supported by CryptoMailer: can I read my encrypted emails?
Yes, see below "How to read an encrypted email I just received, while CryptoMailer is not yet installed?."
How do I send an encrypted email with a picture embedded in email body (Outlook)?

On Outlook, encrypting an email with a picture embedded in the body does not work. If you want to add a picture to your email you must add it as an attachment and CryptoMailer will encrypt it.

How to print a decrypted email on Thunderbird?

To print the decrypted body of an email received in Thunderbird, you need to select the contents of the email and then print the selection. You just can to use the keyboard shortcut 'CTRL+A' followed by 'CTRL+P'. If you print directly from Thunderbird, the encrypted version will be printed.

Which algorithms does CryptoMailer use to encrypt?

Each email is encrypted with a 128bit session key with an AES encryption algorithm. This session key is then encrypted with an asymmetric 2048 bit public with a RSA encryption algorithm. All public keys are automatically posted on an open TheGreenBow server.

Can I install CryptoMailer on my Windows 8 RT tablet?

No, CryptoMailer is not supported yet on Windows 8 RT Release.