Hi, I've been facing some issues by sending emails with Thunderbird, followed every single step from the article https://support.mozilla.org/en-US/kb/cannot-send-messages, updated to the latest thunderbird version, check the SMTP outgoing server config, configured a new different SMTP server, verified if the right server was configured, deleted the SMTP password, uninstall and delete the root folder in C drive but still unable to send emails, i read that it could be a windows firewall issue so turned it of together with the antivirus and then tried to send emails, also in the windows firewall configures a rule allowing all outgoing traffic through port 25, 465 and 577, tried by enable the less secure app option in gmail account and actually i don't have new ideas about this issue, so you are my last option team, any idea or recommendation about how to fix this issue. Please find attached the current configuration of my thunderbird client thanks in advance