A week ago Thunderbird stopped sending messages from gmail accounts. I have a few accounts on my Thunderbird, and all of them are running smoothly regarding downloading messages, so I can read all of them, but I can send new messages only from non-gmail accounts. To use gmail I have to log to the web service. I tried to remove and add again gmail account, but it didn't help. I have the newest and actual version of Thunderbird. I didn't install any new apps last week. The message is: Sending the message failed. The message sending failed because the connection to the outgoing mail server (SMTP) timed out. Please try again or contact your network administrator. Hope someone can help me :) Best, Iwona