SMTP authentication is crucial for secure email delivery and preventing unauthorized use of email servers.
What is SMTP Authentication?
SMTP authentication verifies the identity of users before allowing them to send emails through an SMTP server. This prevents spam and unauthorized email sending.
Common Authentication Methods
The most common methods include PLAIN, LOGIN, and CRAM-MD5. Modern servers also support OAuth 2.0 for enhanced security.
Setting Up Authentication
Configure your email client with the correct username, password, and authentication method. Use App Passwords for services like Gmail.
Pro Tips
- Always use encrypted connections (TLS/SSL) with authentication
- Use App Passwords instead of regular passwords when available
- Enable two-factor authentication on your email account
- Regularly rotate your SMTP credentials