Thunderbird 52.3.0 is out

Martin Brinkmann
Aug 17, 2017
Email, Thunderbird

Mozilla Messaging released Thunderbird 52.3.0 on August 16, 2017 to the release channel and all supported operating systems.

The new version of the popular email client is a bug fix release; means, it fixes issues in the client but does not introduce new features to it or make changes to existing ones. Also, no security updates in the release.

Thunderbird's automatic update feature may not pick up the update right now. You can check for new updates with a click on Help > About Thunderbird.

If the new version is not picked up, you may download and install it manually instead. Head over to the official Thunderbird download page and select the version that you are using from the list of supported languages and operating systems.

Thunderbird 52.3.0

The new version of Thunderbird fixes the following issues in the email client:

  • Unwanted inline images shown in rogue SPAM messages
  • Deleting message from the POP3 server not working when maildir storage was used
  • Message disposition flag (replied / forwarded) lost when reply or forwarded message was stored as draft and draft was sent later
  • Inline images not scaled to fit when printing
  • Selected text from another message sometimes included in a reply
  • No authorisation prompt displayed when inserting image into email body although image URL requires authentication
  • Large attachments taking a long time to open under some circumstances

Most of the issues that Thunderbird 52.3.0 fixes impact only a small number of systems the email client is installed on.

Thunderbird 52.3.0 has two known issues that are listed in the release notes. The first affects users who select Send To > Mail recipients on Windows. This does not work anymore. A solution is provided; Mozilla Messaging asks users to install the Microsoft Visual Studio 2015 redistributable runtime library, or the Universal C Runtime for Windows Server to fix the issue.

The second issue causes multiple requests for the master password when Gmail OAuth2 is enabled.

These issues probably don't affect to many users of the email program either. Still, for those affected by at least one of the fixed bugs, it is a welcome update.

Since Thunderbird 52.3.0 does not fix any security issues, there is no rush to install the update unless you are affected by one of the issues that were fixed in the release.

Now You: Thunderbird, or another program? Which software do you use for email?




Thunderbird 52.3.0 is out
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Thunderbird 52.3.0 is out
Mozilla Messaging released Thunderbird 52.3.0 on August 16, 2017 to the release channel and all supported operating systems.
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  1. Charlie C said on December 12, 2017 at 8:58 pm

    Thunderbird 52.5.0, Win10. I keep getting email connection to server time out messages and can not fix it. There is no time out settings and no Disk Space timeout tab as was in older versions.

    Tools>Options>Advanced>Network>Disc space tab is missing and I could not find an appropriate timeout setting in Thunderbird about.config.

    Does anyone know how to change the timeout time to fix this problem in version 52.5.0 or related series releases?

  2. Tom95472 said on November 30, 2017 at 4:03 am

    Thunderbird Problem with IMAP (AOL) Passwords – Repeated Request to enter password.
    I’m running Thunderbird 52.5.0 (32-bit) on Windows 7 SP1 (64-bit) on Dell8103.
    Have several different AOL Accounts. Whenever I start up TBird it asks for several of the password, sometimes repeatedly. I do use Password Manager. See a lot of posts on this around but no solutions.

  3. Michael said on August 21, 2017 at 9:41 pm

    Thunderbird 52.3 has security updates.
    See the following

  4. pd said on August 18, 2017 at 11:23 am

    No 64-bit edition? Geez. Does this even use e10s yet so the massively slow global update/download/import of mail on initial installing of the program doesn’t entirely block the main UI thread, if not hang the app before users even get a chance to start using it?

    1. Wayne said on August 18, 2017 at 3:04 pm

      e10s is well suited to Firefox, but isn’t well suited (or oven poorly suited) to solve Thunderbird’s threading contention – which are more multiple micro architecture issues with no one single silver bullet to solve them all.

      If you have a performance issue, file a support request at

  5. Michael said on August 18, 2017 at 7:48 am

    Drag and Drop in the address book still doesn’t work.

    1. Wayne said on August 18, 2017 at 3:01 pm

      @Michael, there are no new/recent drag and drop issues except one reported caused by an addon – Sogo. You should test in safe mode

  6. Anonymous said on August 17, 2017 at 1:20 pm

    Is end-to-end encryption support still planned for a future Thunderbird version ?

    Some time ago IIRC there was a question from the developers to the community about what path Thunderbird should take, and support for encrypted mail was one of two paths. I wonder what’s up with that.

  7. Nik said on August 17, 2017 at 9:39 am

    Is thunderbird also moving to webext addon system?

    1. Jody Thornton said on August 18, 2017 at 1:50 am

      Hmmm that’s a good question

  8. Anonymous said on August 17, 2017 at 7:07 am

    stopped with updating ANYTHING

  9. Anonymous said on August 17, 2017 at 6:43 am

    With Thunderbird I do not need the Quick Filter Bar that’s why I hide it. Most of the time when I start Thunderbird, the Quick Filter Bar is displayed. Years earlier I switched to FossaMail (Unofficial/unpublished private build), the Quick Filter Bar does what I ask.

  10. RossN said on August 17, 2017 at 6:24 am

    There are two of us here. One uses Thunderbird. One uses eM Client.
    Today we received a large winmail.dat file into Thunderbird, which the unsupported Lookout+ 1.2.15 add-on would not extract without corrupting the files. eM Client to the rescue!

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