How To Password Protect The Email Client Thunderbird

Martin Brinkmann
Jun 28, 2010
Updated • Jun 26, 2017
Email, Thunderbird
|
15

Password protection is not enabled by default in the email client Mozilla Thunderbird. Anyone with access to the computer system may open Thunderbird, read the emails and look at contacts and other information stored in the software.

This lack of protection could be a problem if multiple users are using the computer or if other users have (theoretical) access to the PC which is often the case at work.

The following guide reviews two options on how to protect the Thunderbird email client to prevent unauthorized access to the data.

Password Protection Add-on

Thunderbird, just like Firefox, supports add-ons. Add-ons are small programs that increase or change the functionality of the email client.

Profile Password is a Thunderbird add-on that offers the means to password protect a Thunderbird profile. The extension adds a new entry to the Tools menu of the email client.

profile password
profile password

Thunderbird displays a password form on startup once a password has been set in the extension's options.

This protection is generally considered to be weak, largely because of options to circumvent the protection. It is for instance possible to access the mails and other information directly in the Thunderbird profile directory.

It might provide enough protection in some situations but technical users will find a way around it eventually. This protection becomes stronger if IMAP accounts are used since the emails are by default not downloaded to the local computer system. Thunderbird 3 on the other hand makes use of email synchronization by default which downloads the messages to the local PC. This feature needs to be disabled in Account Settings --> Synchronization & Storage.

Using Encryption

Profile encryption is the only available option to protect a Thunderbird profile completely from access by third parties. The encryption software True Crypt is a popular choice as it is available for Windows, Linux and Mac.

See Create a secure data safe with True Crypt for pointers on how to create an encrypted partition or container on your computer.

It's more complicated to setup but yields the highest possible protection. The basic concept is to create an encrypted container or partition on the computer before moving the Thunderbird profile folder there.

Existing profiles need to be moved to the new location and Thunderbird configured to use that new location for storage.

The encrypted storage container needs to be mounted before Thunderbird can access the profile. The user basically needs to enter the password to decrypt the storage. This has to be done at least once in every computing session in which Thunderbird is needed. At least once means that it depends on the user's handling of the encrypted storage after Thunderbird has been used. Some users might prefer to unmount the encrypted container to protect Thunderbird efficiently while others might prefer to keep it mounted to be able to access emails in Thunderbird faster.

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Comments

  1. JMGG said on January 19, 2012 at 8:25 am
    Reply

    You said that Outlook isn’t your main email client, so which is your main one?

    1. BalaC said on January 19, 2012 at 9:42 am
      Reply

      I think its thunderbird

    2. Martin Brinkmann said on January 19, 2012 at 10:15 am
      Reply

      It is Mozilla Thunderbird.

  2. Salaam said on September 24, 2012 at 9:52 pm
    Reply

    Awesome! This actually solved my problem… what a stupid bug.

  3. Claud said on December 19, 2012 at 2:08 am
    Reply

    If this is the same bug that I’ve encountered, there may be another fix: (1) hover over open Outlook item in Taskbar, cursor up to hover over Outlook window item, and right-click; (2) this should give you Restore / Move / Size / Minimize / Maximize — choose Move or Size; (3) use your cursor keys, going arbitrarily N/S/E/W, to try to move or size the Outlook window back into view. Basically, the app behaves as though it were open in a 0x0 window, or at a location that’s offscreen, and this will frequently work to resize and/or move the window. Don’t forget to close while resized/moved, so that Outlook remembers the size/position for next time.

    1. Lynda said on February 12, 2013 at 3:37 pm
      Reply

      THANK YOU Claude!!! I could get the main window to launch but could not get any other message window to show on the desktop. You are my hero!!!!

    2. Chad said on November 20, 2018 at 4:24 pm
      Reply

      Solved my issue! 6 years later and this is still problem…

    3. Ivan X said on January 21, 2021 at 4:50 pm
      Reply

      Fantastic. Thank you. Size did the trick.

  4. Andrew said on October 26, 2013 at 7:06 am
    Reply

    This solved my Outlook problem, too. Thank you. :)

  5. Charles said on December 7, 2013 at 7:23 pm
    Reply

    Thank you so much, this started happening to me today and was causing big problems. You are a life saver, I hope I can help you in some way some day.

  6. garth said on November 7, 2014 at 7:13 pm
    Reply

    You are a god – thank you!

  7. Faisal said on February 9, 2015 at 10:09 am
    Reply

    thanks a lot…. work like charm.. :-)

  8. Simon said on March 24, 2015 at 11:36 pm
    Reply

    Yah…thanks Claude. I’ve been having the same problem and tried all the suggestions…your solution was the answer. It had resized itself to a 0/0 box. Cheers

  9. Olu said on April 14, 2015 at 1:35 pm
    Reply

    Excellent post. This had me baffled even trying to accurately describe the problem. This fixed it for me.
    Thank you

  10. Coenig said on July 23, 2015 at 7:36 am
    Reply

    Thanks a lot for the article. Don’t know why it happenend, don’t know how it got fixed, but it was really annoying and now it works :-)

  11. Fali said on January 20, 2016 at 4:19 pm
    Reply

    Thanks a lot. I was facing this issue from past 3 week. I tried everything but no resolution. The issue was happening intermittently and mainly when I was changing the display of screen ( as i use 2 monitors). The only option i had was to do system restore. But thanks to you.

    1. MIki said on January 10, 2019 at 11:54 am
      Reply

      I’ve been tried to sole this problem for 12hours. Your comment about changing the display of screen helped me a lot!! Thanks!!

  12. Christina said on January 20, 2016 at 6:14 pm
    Reply

    Thank you…don’t know why this happened but your instructions helped me fix it. Running Windows 10 and office pro 2007

  13. Oz said on July 22, 2016 at 3:20 pm
    Reply

    Great tip! Thanks!

  14. Tracy said on September 1, 2016 at 4:48 pm
    Reply

    Worked for me, too – thank you!!!

  15. shawn said on September 9, 2016 at 10:25 am
    Reply

    It’s Worked for me, too
    thank you very much!

  16. Jari said on October 31, 2016 at 11:53 am
    Reply

    I had a similar issue with Outlook 2013 on Windows 10 and this helped me to fix it. Thank you very much!

  17. Michel H said on November 30, 2016 at 11:08 pm
    Reply

    Thank you so much. Solved!
    Considering you published this in 2012, incredible not been debugged by Microsoft.
    Thank you again. M

  18. Ziad Bitar said on January 9, 2017 at 2:00 am
    Reply

    This problem was faced by only one user logging to TS 2008 r2 using outlook 2010.The issue was resolved.

    Thanks.

  19. Anonymous said on February 15, 2017 at 5:24 pm
    Reply

    Great tip. Thank you!!!! If it helps, I had to use the Control Key and the arrow keys at the same time to bring my window back into view. Worked like a charm.

  20. Rochelle said on March 6, 2017 at 11:59 am
    Reply

    Thank you, this worked !!!!

  21. anom1234 said on May 20, 2018 at 11:20 pm
    Reply

    Man, you are a fucking god. Thanks a lot, what an annoying bug!!

  22. JC said on October 12, 2020 at 2:14 pm
    Reply

    Awesome, this post solved the issue. Many thanks!

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