@aral @cancel I disagree. Running a secure email server with a good reputation is hard work, and not the kind of thing you can do casually any more, but I'm not convinced that the big providers have much of an advantage beyond having the resources to properly configure and manage their services (and IP blocks). Actually, even Microsoft has some low-rep IP blocks (which it manages to its advantage). If anyone has the time to manage their mail services properly, they absolutely can still do that.