Authentication essentials
- Configure SPF to authorize valid sending hosts.
- Enable DKIM signing for message integrity.
- Publish DMARC policy and monitor reports.
Sending best practices
- Warm up new domains/IPs gradually.
- Use double opt-in and clean inactive addresses regularly.
- Avoid spam-like content patterns and deceptive subjects.
- Keep complaint and bounce rates low.
Operational controls
To protect platform reputation, sending limits and anti-abuse checks may apply based on account type and traffic patterns.