Outlook is sending emails 3 days behind

[cmmngsed]

I was getting frustrated with Redbox because I was getting emails with deals that were expired. Today I called them out and was going to give them a piece of my mind. While on hold, I clicked on forward so I could send them the email and prove to them that I received the email late. When I did, it showed that the email was sent at 8:20 am on 12/1, but the email was received today, 12/4 at 11:13 am. The initial notification was on my android phone.
Do you know why this is?