What’s the acceptable burst volume for bulk sends?

Acceptable burst volume for bulk sends depends on your established reputation and provider relationships. High reputation senders can handle larger bursts than new or low reputation senders.

Best practice limits bursts to reasonable multiples of normal volume. If you typically send 100,000 daily, a 200,000 message promotional burst may be acceptable. A 1,000,000 message burst from the same infrastructure likely triggers throttling.

Plan large sends in advance. Spread volume over hours rather than minutes. Consider phased deployment where initial batches verify deliverability before full deployment. Monitoring during burst sends enables quick response to problems.