Receiving emails very late from Hotmail / outlook

I am receiving the emails very late i.e delay of 3 - 4 hours from Hotmail and outlook.

I have complained outlook about this issue but they are saying everything is working fine from their side and our IP isn't Block from their end.

There is no delay from Gmail or Yahoo or other email services.

John Marx Replied

11/7/2017 at 6:07 PM

Check mxtoolbox.com to see if you have everything setup correctly. I know that is the first place we look at for everything. If you are receiving in 3-4 hours that seems very fishy. Possible hitting a backup MX server and then delivering?