text: Yahoo Rolls Out E-Mail Authentication, Added Storage Yahoo on Monday implemented its own sender authentication scheme, dubbed DomainKeys, for its free Web-based mail service. DomainKeys is one of several authentication technologies that hope to put a stop to 
inputs: Yahoo Rolls Out E-Mail Authentication, Added Storage Yahoo on Monday implemented its own sender authentication scheme, dubbed DomainKeys, for its free Web-based mail service. DomainKeys is one of several authentication technologies that hope to put a stop to 