Essteekay wrote:
When I click on an email message it opens a different message. A friend who lives hundreds of miles away is having same issue. She uses Mail app while I use Thunderbird, as I have done for many years. I have an iMac and am running Ventura.
As this issue is presented and pertains to you specific computer
Suggest communicating with the Developers of Thunderbird which is a Third Party Application.
link below
https://support.mozilla.org/en-US/products/thunderbird
After all, it is there software to support on such matters
Yes, it is running on macOS by Apple but the Application itself, is not an Apple Application