Email throttling slows your delivery rate. Here's why ISPs do it and how to avoid it.
What is Throttling?
ISPs limit how many emails they accept from you per hour. Exceeding limits causes delays or blocks.
Why It Happens
- Sending too fast
- Poor reputation
- Sudden volume spikes
- Technical issues
How to Avoid
- Warm up new IPs gradually
- Send consistently over time
- Monitor feedback loops
- Segment large sends
Conclusion
Throttling protects ISPs from spam. Respect their limits and you'll avoid delays.