Thunderbird. When I open an incoming email (double click) it goes immediately to single window in compose mode, with my name as sender instead actual senders email address. There is message at bottom “A unique identity matching the From address was not found. The message will be sent using the current field and settings from identity (my name)” This happened just today (16 jan 2025). Previous email already received and read without any issue, also come up in the compose message mode. I have win 10 installed on desktop. Thank you Steph