There are thousands of prior posts about this. It's not just a W10 thing but stop using W10's mail app. It can delete email on the server and cause loss.
Read https://www.dell.com/support/article/us/en/04/sln285416/microsoft-outlook-2010-and-2013-will-not-send-or-receive-email?lang=en about how I work this one.
My wife has a HP 250 GS Notebook with a 2.00 GHz I3 processor and 4GB RAM. It is running Windows 10 Home 64 Bit Version 1803 Build 17134.228. This week there was a major Windows update and since then she has a problem receiving emails using Outlook 2010. All emails since then now appear in the program called Mail (which can be accessed by selecting the start button) which lists the new emails but there are none of the usual Outlook features – no extra folders like Sent, Deleted etc. and no Contacts listing. I selected Send/Receive in the normal Outlook window (which program is still there) and got an error message “Not Implemented” (which I have never seen before).
I tried a system restore to a date before the update and after an extended length of time I got the message that the System Restore was unable to restore the files and had failed.
My wife doesn’t want a complicated system and I would like to get Outlook to work life before i.e. the new emails appear there, and she can create and send emails.
Has anyone got any suggestions?
By the way, I sent this on my Windows 7 desktop working fine