“Under the 1986 law, email that has been stored for 180 or more days is considered to be ‘abandoned’ and can be perused by federal authorities sans a warrant. But in an era of cloud computing and services like Dropbox, most Americans certainly would beg to differ that any emails stored online had been abandoned.”
Read more: https://fee.org/articles/pre-internet-laws-are-jeopardizing-todays-electronic-privacy/