Can you resend to a bounced address if it’s temporary?

Resending after soft bounce: Yes, with caveats.

Appropriate retry:

Soft bounces (4xx) invite retry. System should automatically queue for retry. Exponential backoff prevents flooding.

Tracking is essential:

Count failures per address. Track time since first failure. Monitor for pattern emergence.

When to stop:

After N consecutive failures (3-7 typical). After time window exceeded (7-30 days). When error converts to permanent.

Manual re-sending:

Generally discouraged. Let automated retry handle it. Override only with good reason.

Why threshold matters:

Persistent soft bounce indicates real problem. Abandoned mailbox, inactive account. Continued sending wastes resources and reputation.

Retry soft bounces, but do not retry forever. Patience has limits.