User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:65.0) Gecko/20100101 Firefox/65.0

Steps to reproduce:

Since update of Thunderbird 60.5.2 - Send to > Mail recipient" on Windows no longer works. Windows 7

Actual results:

Right clicking on file in Windows explorer and using mail to recipient does not work.

Expected results:

Thunderbird should have opened with the option to send an email with the attachment.

I can confirm that 'Send To > Mail recipient' no working on Windows 7 and on Windows 10 since today update to Thunderbird 60.5.2.

It the same bug as in Bug 1531023

I did not see the previous bug report, though I did look. Sorry for the duplication

They are duplicate bug reports for that issue...

Bug 1531023 "Send To"/"Mail Recipient" from Windows context menu not working in TB 60.5.2
Bug 1531465 SEND TO MAIL RECEIPIENT STopped work in after update to 60.5.2

Another duplicate Bug 1531352 "Sent to mail recipient not working"

I can confim the bug, it's really a shame because at our company more and more people started using it and as TB updated, people started complaining... It's also broken on TB 66 Beta 2 AND it crashes it.

I can confirm as well that on Windows 10 Pro 64bits [Version 10.0.17134.590] with TB 66.0b2 (32-bit) the mail recipient feature does not work as expected and simply crash the application.

While TB up and running, opened File Explorer, right click a .pdf file, selected Sent to > Mail Recipient, the attached warning appeared ("Another application is attempting to send mail using your user profile..."), clicked OK, TB application is Not Responding for a while and then crash (close by itself) without any crash reports generated.

Duplicate bug list:
Bug 1531190 Since update 60.5.2 - Send to > Mail recipient" on Windows no longer works. Windows 7
Bug 1531465 SEND TO MAIL RECEIPIENT STopped work in after update to 60.5.2
Bug 1531352 Sent to mail recipient not working
Bug 1531678 MAPI doesn't work - "Send to mail recipient"

See bug 1530820 comment #30.

(In reply to Richard Leger from comment #7)

Created attachment 9047671 [details]
AnotehrAppicationisAttemptingToSendMail.png

I can confirm as well that on Windows 10 Pro 64bits [Version 10.0.17134.590] with TB 66.0b2 (32-bit) the mail recipient feature does not work as expected and simply crash the application.

While TB up and running, opened File Explorer, right click a .pdf file, selected Sent to > Mail Recipient, the attached warning appeared ("Another application is attempting to send mail using your user profile..."), clicked OK, TB application is Not Responding for a while and then crash (close by itself) without any crash reports generated.

This issue was raised in a separate bug 1524762 already...