Fixing SPF PermError (10-Lookup Limit)

Meeting the strict 10-lookup limit is the most common challenge in modern email infrastructure. Here is the operational playbook for resolving it.

Method 1: Smart Flattening (Recommended)

Flattening involves replacing hostnames (which require DNS lookups) with their underlying IP addresses.

Method 2: Subdomain Segmentation

Move third-party services to dedicated subdomains (e.g., marketing.yourdomain.com). This isolates their lookups from your root domain, protecting your corporate email deliverability.