Freemail

Employees might start a freemail account to exchange off-color jokes or distribute their resumes.

In theory, you can establish a freemail account that will endure whether you change jobs or Internet service providers. But most freemail sites limit the amount of mail you can store, so delete old and unwanted messages […]

Even if you have no intention of ever using a freemail account with Yahoo or Hotmail, it's worth opening one for this reason alone.