You are checking the settings of the mail app. It's not something I can tell you the settings since it changes with your mail service. Always have to ask them for the settings.
W10 does have a reset and save files but given we have Chrome, Thunderbird and so many alternatives I'd just use what works. Microsoft has a very poor track record on their free email apps.
I am helping a friend that has problems with MS Mail and People. She can receive email but cannot type in anything in MS Mail. Also all her People contacts have changed to only showing phone numbers and not email addresses.
Tried to open Edge but cannot type in anythibg. Chrome is default and it is working fine. Some time ago my friendsaid her home had a power outage, but she couldn't remember if the Mail problem was occurring before the outage or not.
When I got there, she had 10 MS updates not installed. In installed all of them and rebooted but nothing changes.
I hoping someone can give me a couple of suggestions on where to look and what I should update.