Give up: When the email continues to be sent, the client sends the Give up command into the server, severing the connection. If it has been properly closed, the server will reply with a 221 code. You can use the file upload choice to add a diagnostic file, like https://it-support-services90009.topbloghub.com/32827653/helping-the-others-realize-the-advantages-of-virtual-machine-install