Does my ESP handle retry logic automatically?

Most ESPs handle retry logic automatically:

What ESPs typically do:

Automatic retry on 4xx responses. Built-in exponential backoff. Configured retry windows. Automatic conversion to hard bounce after exhaustion.

What varies by ESP:

Retry count and timing. Total retry window duration. Soft-to-hard conversion thresholds. Configuration flexibility.

Questions to ask your ESP:

How many retries before giving up? What is the total retry window? Can I customize retry behavior? How is conversion to hard bounce decided?

When you might need custom handling:

Time-sensitive messages needing shorter windows. High-volume sending needing specific tuning. Custom classification requirements.

ESPs handle the mechanics; you set the strategy. Understand your ESP's defaults and customize if needed.