What are ESP postmaster relationships?

ESPs cultivate relationships with MBP postmaster teams to resolve delivery issues and stay informed about policy changes. Direct contacts enable faster escalation when legitimate senders face problems and advance notice of upcoming requirements.

These relationships benefit all senders on the platform. When Gmail announces new authentication requirements, ESPs with good postmaster relationships learn early and can prepare customers. When a sender experiences unexplained filtering, the ESP can escalate through established channels.

Relationship quality varies between ESPs. Evaluate potential providers partly on their MBP relationships. Ask about: postmaster contacts at major MBPs, escalation processes, and track record resolving delivery issues. Strong relationships indicate ESP investment in delivery quality.