Sending, receiving, and organizing email in Outlook.com
I have the same problem with my @hotmail.com mail account since YEARS !
I created another account @outlook.com , which is working perfectly, but I would prefer Microsoft to solve the issue with the @hotmail.com domain name ! There must be something wrong in the configuration of those @hotmail.com mail account, since we don't receive *some* mails at all (not even in the Junk folder) ....