This usually indicates your script was blocked by the security filters of providers like Google or Microsoft. Use App Passwords or OAuth2 tokens instead of your account's primary master login credentials.
Always use port 587 (TLS) or 465 (SSL) to ensure your credentials and email content are encrypted during transmission. Use Cases for MailKeker.py
MailKeker.py usually outputs results in structured formats:
You can turn MailKeker.py into a fully hands-off reporting tool by scheduling it via your operating system: