Thunderbird 60.5.3 available

[German]On March 5, 2019 the Mozilla developers have released the email client Thunderbird version 60.5.3. This is a maintenance update which fixes the MAPI problems of version 60.5.2. Here is some information about it.


The mailto bug

There was a bug under Windows that caused mailto files to be sent in Thunderbird 60.5.2 (and possibly earlier versions). I have discussed the issue and a fix in the article Thunderbird 60.5.2 causes a MAPI error – a workaround. This caused Mozilla to temporarily suspend the auto update to Thunderbird 60.5.2 on Windows.

Thunderbird 60.5.3 available via Auto-Update

German blog reader mike pointed out within this comment, that Thunderbird 60.5.3 available (thanks). 

Thunderbird 60.5.3

I just started the update search in Thunderbird, and got the update offered (see screenshot). According to the release notes, the following bug has been fixed: 

Problem when using "Send to > Mail recipient" on Windows introduced in version 60.5.2

The following known bugs have not been fixed: 


  • Due to changes in the Mozilla platform profiles stored on Windows network shares addressed via drive letters are now addressed via UNC
  • Chat: Twitter not working due to API changes at

The mail client can be downloaded from the Thunderbird site for Windows, macOS and Linux. Further details can be found in the Release Notes. 

Are there any new issues?

Within this comment German blog reader Martin Wirtz confirmed, that the automatic update fixed the mailto bug in Windows 7. But he thinks he found a new bug in Windows 7:

The computer now has some problems with long file paths that are not on the desktop. File attachments can be sent from the desktop.

I tried to to include an attachment from a folder with a path name of about 20 characters, and could not reproduce the issue Martin reported. Here the Thunderbird sent this attachment. Can anyone else confirm the error mentioned above? 

Similar article:
Thunderbird 60.5.2 released
Thunderbird 60.5.2 causes a MAPI error – a workaround
Thunderbird 60.5.2 pulled (March 5, 2019)

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