Are deleted emails saved by email companies for law enforcement or civil law
I heard that Google keeps your searches (by IP address) for six months or more, Microsoft a year and a half! So I got to thinking about emails. Text is trivially small to store and never delete. And with memory only becoming cheaper and more expansive, the downside for keeping information will continue to diminish.
I could imagine that intelligence agencies would love to be able to trace threads of communication back in time, for years. And of course, local law enforcement could use the information, if legal, too. Then there are all manner of civil cases; a divorce seeking information about online infidelity for example...
Anyone know for certain what companies are doing about this sort of online privacy?
If not, what is your guess as to what's being done?