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.
To help prevent this sort of abuse, Google is participating in DMARC.org, which gives domain owners more control over what Gmail does with spam emails from their domain. Google Apps follows the DMARC.org standard and allows you to decide how Gmail treats unauthenticated emails coming from your domain.o help prevent this sort of abuse, Google is participating in DMARC.org, which gives domain owners more control over what Gmail does with spam emails from their domain. Google Apps follows the DMARC.org standard and allows you to decide how Gmail treats unauthenticated emails coming from your domain.