How do ESPs handle blocklist events?

Reputable ESPs actively monitor their infrastructure for blocklist events and respond quickly to protect their sending reputation and all customers.

When a listing occurs, ESPs typically investigate the cause. They identify which customer or campaign triggered the issue and assess whether it resulted from policy violation or technical error.

For shared IP infrastructure, ESPs may suspend the offending sender to prevent further damage to the pool. This protects other customers who share that resource.

ESPs handle delisting requests on behalf of their customers when the issue involves shared infrastructure. They have established relationships with major blocklist operators and understand remediation processes.

ESPs also provide guidance to affected customers about what went wrong and how to prevent recurrence.

A responsible ESP is the fleet manager who maintains all vessels. When one ship causes problems, they act to protect the entire fleet.