To troubleshoot SPF failures:

1. Identify your Return-Path (bounce) domain from your email headers

2. Locate the sending IP address(es)

3. Use the Vamsoft SPF Policy Tester to diagnose issues

4. Common causes of SPF failures:

   • Missing include:Emailmail.com in SPF record

   • Incorrect IP addresses in SPF record

   • Too many DNS lookups (exceeding 10 lookup limit)

   • Syntax errors in SPF record