If your email account has Two-Factor Authentication (2FA) or an Authenticator App enabled, your regular login password will NOT work for SMTP. You need to generate a special App Password instead.
๐ง Gmail / Google
Google Account โ Security โ 2-Step Verification โ App Passwords โ Select "Mail" โ Generate 16-char password
๐ฌ Outlook / Hotmail
Microsoft Account โ Security โ Advanced Security โ App Passwords โ Create new
๐ฎ Yahoo Mail
Yahoo Account โ Security โ Generate App Password โ Select "Other App" โ Generate
๐ฉ Zoho Mail
Zoho Account โ Security โ App-Specific Passwords โ Generate new password
๐ก Tip: Use the generated App Password in the "SMTP Password" field below โ not your regular login password. App Passwords are typically 16 characters (e.g. abcd efgh ijkl mnop). Each can be revoked individually without affecting your main account.