Most popular email host

Many companies use professional email services. Having an sales@mycompany.com looks much better than using sexy_lizard89@hotmail.com. These statistics reflect what email provider is the most popular. (Keep in mind that any free email provider is automatically excluded).
This data has been retrieved by accessing the DNS MX records from all the domains in our database.
Top email hosters
# MX Host Amount
1 Google.com 578,524
2 Outlook.com 364,409
3 Secureserver.net 310,878
4 Googlemail.com 224,248
5 Ovh.net 108,767
6 Kundenserver.de 65,703
7 Registrar-servers.com 59,727
8 Rzone.de 57,585
9 Yandex.net 49,039
10 Emailsrvr.com 48,627