Does using an ESP guarantee bounce accuracy?

Myth: ESP bounce handling is always accurate.

Reality: Quality varies:

ESP advantages:

Dedicated bounce processing. Large sample size for patterns. Continuous dictionary updates. Professional maintenance.

ESP limitations:

Dictionaries may be outdated. New patterns may be missed. Some classify too aggressively. Others too conservatively.

Verification approach:

Sample audit classifications periodically. Review suppression rates. Investigate unusual patterns. Access raw data when needed.

Sender responsibility:

You own your list quality. ESP is a tool, not absolution. Monitor outcomes, not just trust.

ESPs help but do not guarantee. Verify their work on your data.