How do CRMs sync bounce status across systems?

CRM bounce sync maintains consistent suppression:

Sync mechanisms:

API integration: Real-time updates via ESP API. Webhooks: Push notifications when bounces occur. Batch import: Periodic bounce list sync. Native integration: Built-in ESP connection.

Sync data elements:

Email address. Bounce type and date. Bounce reason/code. Suppression status.

CRM record updates:

Mark contact as bounced. Flag email as invalid. Add to do-not-email list. Record bounce history.

Multi-system considerations:

Sync across all email-sending systems. Centralized suppression list. Consistent status across platforms.

Challenges:

Timing delays between systems. Data format differences. Handling unsuppression. Duplicate records.

Sync ensures no system sends to known-bad addresses. Disconnected systems create bounce recycling risk.