Hi Žan, Is this a new account and you can't connect or it's your existing account that stopped working? 0. Check your internet connection: Make sure you have a stable internet connection and that your network is not blocking SMTP traffic. 1. Check Gmail server status (https://www.google.com/appsstatus/dashboard/) 2. Check SMTP server settings: Ensure that you have entered the correct SMTP server settings for Gmail. The SMTP server for Gmail is smtp.gmail.com and the port number is 465 or 587. Also, make sure you have enabled the “Allow less secure apps” option in your Gmail account settings. 3. Disable antivirus or firewall temporarily: Disable any antivirus or firewall programs temporarily as they may be blocking the SMTP traffic. 4. Check your VPN client whether it disables the SMTP ports