I have had Mozilla Thunderbird for many years and used it daily. Now you are writing to me that you want to close my mail program because I haven't used it for 2 years. I have 2 email addresses linked to Mozilla Thunderbird: kurtj1942@hotmail.com and kurtj1942@gmail.com. I can receive emails from the Hotmail account, but I cannot send. From the Gmail account, I can both send and receive. Why can't I send from the Hotmail account? Sincerely, Kurt Jørgensen