> by the big three
Which big three?
Gmail has something like 1.8 billion users. iCloud mail around 1 billion.
Microsoft with 400 million users of its email is closer to Yahoo! Mail (225 million users) than to the big two.
User numbers aren't the only factor. Microsoft has a much larger presence in commercial email than Apple. I suspect an outbound email from a personal provider is far more likely to be destined for an outlook inbox than one on iCloud.
User numbers aren't the only factor. Microsoft has a much larger presence in commercial email than Apple. I suspect an outbound email from a personal provider is far more likely to be destined for an outlook inbox than one on iCloud.