Domain vs. IP Reputation

In 2025-2026, domain reputation is the primary filtering signal for Gmail.

Why domain reputation matters more:

• Domains are harder to swap than IPs
• Tied to brand identity
• Follows you across ESP changes
• IP reputation does NOT transfer

Three domains evaluated independently:

1. From address domain
2. DKIM signing domain
3. URL domains in email body

Microsoft is the exception — still weighs IP reputation heavily. A reputation problem at Outlook but not Gmail is likely IP-related.

Recovery timelines:

• IP reputation: 2-4 weeks
• Domain reputation: 6-12 weeks 😬