Earthlink added an anonymous email service available to Earthlink members on Tuesday. The ProtectionPack gives users five anonymous email addresses that are linked to the user's main account. This way, users can sign up at various websites using these anonymous email accounts while their identities are protected.

For users, it's a good way to cut down on spam and clogged inboxes. For email marketers, it could result in fewer messages being read or delivered and wasted efforts. Marketers are in a constant battle to get their messages delivered and not be treated as spammers and this could provide yet another roadblock.

For some useful tips on email deliverability read this article, published in Website Services Magazine's August issue.