A close deal on acquisition of Google to Postini finally made into public and work around of implementing to Google Apps including gmail in terms of security has been made. This will surely increase Google App users security on accessing and using service provided by Google. More on press release here.

But competition is there so as Google have Postini, then Yahoo made its own DomainKeys. This is will also enhance and improve security risks involving Yahoo mail on those fraudsters that are rampant in the internet today trying to steal your valuable information and compromising your hard earned money eventually. Official Press release of Yahoo.

This will help generally help users experience reliability and secured on transactions involving emails by cutting those risks associated with emails.