Density is defined as how thick or thin you want your hair to be. The standard and most popular choice is 130% which is Medium Density. You can see examples of the density - Click Here.
Google's Gmail Web-based email service runs on the Internet Message Access Protocol system, but it also offers Post Office Protocol mail server access.
Use the restricted SMTP server aspmx.l.google.com. Connect to aspmx.l.google.com on port 25. Configure an SPF record for your domain with the IP address of the device or application to ensure that recipients donât reject mail sent from it. In your Google Admin console, add this IP address to the Email Whitelist box.