Deliverability
Throttling
Rate limiting email sending speed to avoid overwhelming receiving servers or triggering spam filters.
Definition
Email throttling is the practice of limiting sending speed to avoid overwhelming receiving servers or triggering spam defenses. ISPs may also throttle incoming email from senders during warmup or when they detect unusual patterns. Proper throttling during sending helps maintain good sender reputation and ensures consistent delivery.
Pro Tip
Start with conservative sending speeds for new campaigns or lists, increasing gradually as you establish reputation.