Expertise: Look for providers with a proven track record and specialized knowledge in email security. Customization: Ensure that the provider can tailor their services to meet your specific needs and requirements. Scalability: Choose a provider that can grow with your business and adapt to increasing security demands. Support: Verify that the provider offers 24/7 support and quick response times to address any issues that may arise. Integration: Ensure that the MSSP can seamlessly integrate with your existing email marketing platforms and tools.