[_asciiker_]

I don't think so, depends on where you live and the laws that apply there. It's probably easier to seize a home server than it is to hassle a company to divulge its contents.

[pjc50]

I think it's the other way round in the US. Conventional email hosting providers are definitely not protected by the 4th. Also for political activists, actually raiding their homes is a dead giveaway whereas leaning on companies can be done quietly.

[secfirstmd]

Or use a Covert Method of Entry approach...