{SOLVED}Thunderbird message copies not saved to sent folder

[Cattleman]

Thunderbird message copies not saved to sent folder. This just started happening today on all 3 of my computers. Any suggestions?

This problem isolated to email provider Windstream.net

[Cosmo.]

Open the account settings and check the settings for copies & folders.

[Cattleman]

Settings are as should be on each of 3 computers. This problem happened overnight. I created a new save folder located under local and directed saved copies to the new folder. All copies are now saved to the new save folder. What I don't understand is what changed that necessitated this creation of a new save folder located under local. And why did it happed overnight on all 3 computers.

I get the following error messages: The current operation on Inbox did not succeed. The mail server for your account @windstream.net responded: Unrecognized command ID.

The other error message is: The current operation on sent did not succeed. The mail server for your account @windstream.net responded: Unrecognized command ID

It all depends on which folder my cursor is on.

[Cosmo.]

"Over night"? Assumed, that you slept and the computers had been off I can only think of some change on the side of the mail-provider.

[Cattleman]

Mail provider claims they made no changes. Browser accesses email fine. Problem seems to only apply to Thunderbird. Perhaps after regular updates?

[Cosmo.]

Hardly, other users would have the same problem.

Create a fresh new user account for testing (so your main account and the TB profile do not get affected) and set up inside TB for your mail-account and compare the behavior.