Thunderbird on Windows 10/11
I supply software that uses TB to send emails with an attachment (via MAPI - an invoice) I have a number of customers for whom this has stopped working. I tested all of t… (read more)
I supply software that uses TB to send emails with an attachment (via MAPI - an invoice) I have a number of customers for whom this has stopped working. I tested all of these with the usual fixes. The app has full access to the folder containing the file. The app is set as administrator and is inside the firewall. I have set default mail app to TB. TB is set to check as default on startup. Yet windows keeps saying we need to define a default email client. One customer solved the problem by buying a new PC. I have another customer who has this problem on a new PC. There may be a common denominator in Microsoft Office which on loaded onto the PC's. If that is the problem then that is Microsoft denying access to TB? Has anyone had this problem and can suggest a fix I would be grateful.
Steve Hall