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thunderbird starting up issue

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  • 1 has this problem
  • Last reply by jim216

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I updated to Thunderbird 91.x.x several weeks ago, and now, every time Thunderbird starts, I get an error message "Either there is no mail client or the current client cannot fulfill the messaging request. Please run Microsoft Outlook and set it as the default mail client." See attached file. If I press OK or the X to close the window, I have to do this 18 times and then Thunderbird starts up normally. I have not mentioned this before thinking that it would be solved in more recent release but that has not happened. I am running windows 7 and do have Thunderbird set as the default for the programs it can open.

About the same time, Thunderbird published a note that it was adding a PDF function. This works, and opens the PDF but after 5 seconds Thunderbird crashes every time I open a PDF... and I have to go through the process described in the first paragraph to get Thunderbird restarted again.

Attached screenshots

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More info ... IF I move the PDF from the email to my desktop, and open the PDF from that location, Thunderbird does not crash but Thunderbird does crash everytime that I open the PDF within an Email.


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