What’s Google Postmaster Tools vs ESP analytics?

**Google Postmaster Tools** shows **Gmail**'s view of your sending: **domain reputation**, **IP reputation**, spam rate, authentication success, and delivery errors. It's **Gmail**-specific and reflects how Google evaluates your email.

**ESP** analytics show your view of sending: what you sent, aggregate delivery rates, engagement metrics, and campaign performance. They cover all MBPs but from your perspective rather than theirs.

Complementary purposes: **Postmaster Tools** explains why **Gmail** treats you a certain way; **ESP** analytics shows overall program performance. Use Postmaster for **Gmail**-specific troubleshooting and reputation monitoring; use **ESP** analytics for program management and optimization.