My email doesn't work. WHY?!!

My email doesn't work. Answer my question!!!

Hmmm. You waited two minutes before posting again? We are volunteers here. And if you want assistance, you need to tell a lot more than just 'fix it.' And don't expect an answer 2 minutes after you respond.

I have multiple email accounts in Thunderbird. On Feb 24, 2024, one of them stopped working. Nothing is received or can be sent. No changes were made to setup. Can you help diagnose this problem or tell me what to do? Thank you. Michael [edited email from public]

I have multiple email accounts in Thunderbird. On Feb 24, 2024, one of them stopped working. Nothing is received or can be sent. No changes were made to setup. Can you help diagnose this problem or tell me what to do? Thank you. Michael