Delivery

What is Bounce rate?

The share of messages that couldn't be delivered.

How it works in practice

Keep the hard bounce rate under about 2%; anything higher signals a poor list to providers. It's the clearest measure of list quality you control.

Watching only the overall rate and missing a single bad list that pushes it over.

Not sure whether this is what's hurting your inbox placement? A free deliverability review finds the real cause.