What is “retry logic” in bounce handling?

Retry logic governs how sending servers handle temporary failures:

Key parameters:

Retry interval: Time between attempts. Retry count: Maximum number of attempts. Total retry window: Maximum time before giving up. Backoff strategy: How intervals increase (linear, exponential).

Typical configuration:

First retry: 5-15 minutes. Subsequent retries: Increasing intervals (exponential backoff). Max retry period: 24-72 hours. Total attempts: 10-30 depending on configuration.

Intelligent retry logic:

May adjust based on error type. May prioritize certain messages. May vary by receiving domain. May respect receiver-indicated retry timing.

Retry logic balances persistence with resource efficiency. Too aggressive wastes resources; too passive loses deliverable messages.