I am at a loss and tried looking for solutions but, my issue with sending email through Thunderbird Android. I have three accounts, gmail and 2 personal. One of my personal email accounts (IMAP); email gets sent, copied onto server's sent folder and everything is normal... EXCEPT the recipient doesn't get the email. I use this account on Thunderbird Desktop and its fine... I see the sent email from android on the desktop but the email sent doesn't hit the final inbox. Anyone have an idea? I've changed settings (signature, type format, etc.), I've removed the account and added again. I've waited days to see if email gets delivered and it doesn't. It's weird because Thunderbird desktop has no issues.