Off-topic

On September 16th, 2024, Microsoft transitioned from Basic Authentication to Modern Authentication for accessing Outlook.com, Hotmail.com, and Live.com email accounts. This change enhances security by requiring applications to use more secure authentication methods. As a r###lt, email clients that do not support Modern Authentication may no longer sync emails properly. Users are advised to update their email applications to versions that support Modern Authentication to ensure continued access to their accounts.

See these:

Modern Authentication Methods now needed to continue syncing Outlook Email in non-Microsoft email apps

Suddenly unable to import mail from Outlook

Using a third-party email (QQ email) to collect hotmail and live email functions, it prompts "Account or password verification failed"

I found that Gmail suddenly cannot receive Outlook emails on my behalf, with the error message "Logon failure: unknown user name or bad password