Simulate MTA Evaluation
Enter a domain and an IP address. We will simulate exactly how receiving mail servers (like Gmail or Outlook) evaluate your SPF record to determine authorization.
SPF Records Tools
Simulate exactly how receiving mail servers evaluate your emails. Trace the MTA evaluation process step-by-step, match sender IPs against complex CIDR subnets, and catch PermError failures before they impact delivery.
Enter a domain and an IP address. We will simulate exactly how receiving mail servers (like Gmail or Outlook) evaluate your SPF record to determine authorization.
Don't just check your syntax. Simulate the exact evaluation process that receiving mail servers use to determine if your emails should be accepted, marked as spam, or rejected.