Yahoo!Xtra Mail works tirelessly to protect you from phishing. Just what is phishing, you ask? It's when unscrupulous people go online pretending to be someone they're not (like your bank, an e-commerce store, or Yahoo!Xtra) and try to sucker you into revealing your personal information, like passwords, account information, or credit card numbers.

One way phishers try to fool you is by creating fake email messages. These messages look like they're from a company you know and trust. But if you respond, any personal information you send goes straight to thieves.

Yahoo!Xtra Mail uses DomainKeys to combat phishing. Simply put, DomainKeys is a technology that helps fight against email forgery. It verifies that messages are really from the domain they claim to be from (and that they haven't been altered during the sending process). Yahoo!Xtra Mail does all the verification legwork. Look for the DomainKeys icon in messages to see if the senders have been verified.