Since yesterday, I can't send or receive any message anymore in Thunderbird. As shown in attached files thunderbird gmail display.png and webmail gmail display.png, my new received emails are visible on Gmail webmail site but not on my Thunderbird application. When I try to send a message, I get an error message, see attached file sending error.png : "sending has failed because connexion to SMTP server has expired." I didn't change any setting. Please find enclosed my present account, Imap and SMTP settings. Please help me, thanks a lot !