[xdude]

Actually ICANN doesn't provide domains. .com domains are belongs to .com Registry. But again they don't provider domains for end users either. Only domain registrars sell domains to end users. Time to time Domain registrar send you a mail asking you to check your domain owner details and update those if those needed to be. Apart from that only mail you get from them are promos and renewal reminders.

There are several Chinese companies which send you mail asking you to renew your domains. What they do is try to make to transfer the domain to their registrar. Usually those mails are made to panic inexperience users to get to to transfer the domain to them so they can earn money from renewal charges. Also there are some who try to steal the domain making you send it to their account and then ask you to pay higher price if u need domain again.