E-mail authentication has gained widespread attention as a way to combat spam and phishing. Yahoos DomainKeys is one of the two most closely watched efforts; the other is Microsoft Corp.s Sender ID method. Sender ID has faced hurdles as it has wound its way through the standards process at the Internet Engineering Task Force. An IETF working group disbanded in September, largely over intellectual property issues with Sender ID, but the specification also has shown recent signs of life.Microsoft plans to use Sender ID with its MSN Hotmail service, and AOL has said it plans to support a version of the authentication method.DomainKeys also has begun the standards process at the IETF, Libbey said. Yahoo has published the DomainKeys specification, but no IETF working group has yet formed to move the spec toward a standard, As for its other mail announcements, Yahoo appears to be continuing to aggressively compete in the e-mail storage race. The latest storage increase is its second since Googles April launch of a test of Gmail with a gigabyte of free storage. Beyond storage, Yahoo also has made its search more prominent in Yahoo Mail and combined e-mail and Web search in the same query box, a Yahoo spokesperson said. It also has streamlined the way users import contacts into Yahoo mail from other e-mail clients and services. A new contacts feature lets users automatically e-mail all their contacts of their Yahoo address when they switch from another service. Yahoos acquisition of startup Oddpost Inc. has led to some new technology in Yahoo Mail. A recently added feature for automatically completing an e-mail recipients name or e-mail address in the address fields came from Oddpost, the spokesperson said. Check out eWEEK.coms for more on IM and other collaboration technologies.