Hello frank_the_snake_master_01,
Thank you for reaching out to Apple Support Communities, and we'll be happy to help in any way we can. We understand you're having issues with receiving mail on your Mac. Try the steps listed here tos ee if they resolve the issue: Troubleshoot email problems in Mail on Mac - Apple Support
"Troubleshoot email problems in Mail on Mac
If you’re having trouble using the Mail app on your Mac to send, receive, or view emails, refer to the topics listed below for suggestions.
Problems sending messages
If you can’t send emails
If people don’t receive emails you send
Problems receiving messages
If you can’t receive emails
If junk mail filters aren’t working
Problems viewing messages and mailboxes
If a mailbox is offline
If searching doesn’t find the right emails
If emails appear to be missing
If you can’t open Mail
If messages are in a Recovered Messages mailbox
Problems using your email accounts
If an email account is inactive
If a mail server rejects your login information
If Mail can’t connect to your email account
Free up storage space for email accounts
Problems with security
If Mail can’t decrypt emails
If Mail can’t verify a server’s certificate
If Mail can’t verify a signed email"
We hope this helps.
Cheers!