The picture is small by design, click on it and it expands, this keeps the topic tidy so those who need to see it click on it to expand tp the normal size. I would also suggest that when posting images, crop the background so you only have the important bit displayed. This keeps the file size down and avoids the need to scroll.
Is there any connection between the first screenshot and the second, as I don't see it.
In the first image where you have indicated the SMTP Settings, these details you get this information from your email programs default email account and enter it in the boxes. If your server requires authentication (also indicated in your email program, default account) then you need to tick the box and enter the User name and Password.
I haven't got any idea what the second image in the second post is about.