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What are the enhanced security settings for for Thunderbird?

NOTE: These instructions are for Thunderbird versions 2.x.x.x and earlier. If you are using a newer version of Thunderbird, please see the instructions for newer versions.

Enhanced Security users may use Kerberos authentication in addition to TLS to encrypt POP,IMAP, and SMTP authentication. These settings are the same for both Macintosh and PC clones. The configurations are set under the Account Settings menu item in the Tools menu.

Preparation

1. Go to Tools menu and then select the options menu item
2. Go to the Advanced section and make sure you are in the General tab.
3. Click on the Config Editor... button
4. Type "network.auth.use-sspi" in the Filter textbox and press [Enter].

   Case A:

   If you see an entry like below with the value of "false", you can exit out the options and proceed to the Account Settings section.

   

   Case B:

   If you see an entry like below with the value of "true", double click the entry to set its value to "false".

   

   Please exit and restart Thunderbird to save the configuration change.

   Case C:

   If you do not see any entries for network.auth.use-sspi, right click on the white space under "Preference Name" and choose "New", and then "Boolean".

   

   Then, enter "network.auth.use-sspi" and press [OK].

   

   Finally, choose "false" as the value and press [OK].

   

   The about:config list should now look like Case A above.
   Please exit and restart Thunderbird to save the configuration change.

Account Settings

Account Name:
You can enter a nick name for this account.
Your Name:
Your real name.
Email Address:
Your email address for this account.
Reply-to Address:
Email address which you want people to reply to when you send email from this account.
Organization:
Company or organization you belong to.
Attach this signature:
If you have a signature file you can specify it here.
Attach my vCard to messages
Compatible email clients will be able to add you to their address book easily
Outgoing Server (SMTP)
Choose your prefered outgoing server.

Server Settings

Server Name:
This is the internet location name of your server.
Port:
Leave this field as it is; Thunderbird will automatically fill it in for you.
User Name:
This is the login name for your email account.
Use Secure Connection:
Select "TLS"
Use secure authentication
Check this value to enable kerberos support.
Check for new messages at startup:
Check this if you want to automatically look for new email when you begin Thunderbird.
Check for new messages every [30] minutes:
Interval at which Mozilla Mail checks for new mail.

Outgoing Server

Server Name:
Add "smtp." in front of the server name you used in your IMAP/POP server name.
Port:
This is the outgoing server port. Port 587 will be compatible with many ISPs.
User Name and Password:
This is your email account login name.
Use Secure Connection:
Make sure to select TLS to secure your email connection.