"A unique identity matching the from address was not found" and folder flags.
For some time I have had the problem of the above error when double clicking to open an email from the Inbox in a new window. No other folder was affected. The problem did not appear when running in Safe Mode, but still appear when running the base install with no add-ons. This problem persisted after completely reinstalling Thunderbird and upgrading to a newer version of my OS.
For a while I was using the right click to open work around. Recently I found mention on another forum of this problem being solved by installing the FolderFlags add on. I used that add on and discovered that the Inbox folder had both Inbox and Template flags set.
Removing the flag solves the original problem for the duration of the session. But closing and reopening Thunderbird somehow sets the Template flag again, recreating the issue.
How can I prevent Thunderbird from changing the Template flag setting?
被選擇的解決方法
Just a guess, but I would think for Thunderbird to keep changing the template flag, one of your accounts is set in copies and folders for the account settings to use the inbox for templates. Perhaps review exactly what is set for each account.
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選擇的解決方法
Just a guess, but I would think for Thunderbird to keep changing the template flag, one of your accounts is set in copies and folders for the account settings to use the inbox for templates. Perhaps review exactly what is set for each account.
BINGO!
I have a large number of email addresses all going to the same folder. For two accounts I found the same wrong settings:
Message Archives was set to Other: Archives on Local Folders rather than "Archives Folder on: Local Folders.
Drafts and Templates was set to Other": Drafts on Local Folders rather than "Templates" Folder on Local Folders.
Switching both options to the first choice in both address settings fixed the issue.