Implementing the following measures can significantly enhance email server security:
Use strong passwords and change them regularly. Enable two-factor authentication (2FA) for email accounts. Regularly update your email server software to patch vulnerabilities. Implement firewalls and anti-virus software. Use email encryption to protect the content of your emails. Set up spam filters and anti-phishing measures. Conduct regular security audits and penetration testing. Train your staff to recognize and handle email-based threats.