Hi Doug, welcome to the forums .
Which mail app are you using? Is it the default Windows 10 app, just called "Mail"?
Also, do you get any errors appearing?
I would be tempted to try removing the e-mail account and re-adding it again, to confirm it is configured correctly - as long as you've got a backup of your e-mails that you need (as some e-mail providers don't keep them on the server once downloaded).
I'd log into the email accounts using a Browser.
The Server storing your emails may have an Inbox data cap, which when exceeded, locks the syncing, which would explain why sending emails works, but receiving fails when using your Email application.
I doubt the sync settings themselves are incorrect, but you could check that in your Mail app just to make sure the Receive settings have not been modified with incorrect information or rules.
In the Mail app on left side click Accounts, then on right side click on the account that is not receiving mail.
Now beneath Change mailbox sync settings click on the hyperlinked Options for syncing your content
Next, beneath Advanced mailbox settings click the hyperlinked Incoming and outgoing mail server info
If you have to make changes click Done when you've finished, otherwise just click Cancel and close out of the windows.
I do not have advanced mailbox settings there. There is nothing below the on/off for email, calendar, contacts. That link is simply not there.
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