How to reduce your email bounce rate

What bounce rate is and why it matters

Your bounce rate is the share of the emails you send that are not delivered. Inbox providers treat it as a signal of list quality. Many senders aim to stay under about 2 percent, and email platforms may warn or suspend accounts when rates climb much higher.

Bounces come in two kinds. See our guide to hard and soft bounces for the difference.

Nine ways to lower your bounce rate

1. Check addresses when people sign up, not months later.
2. Use a confirmation email so only working addresses stay on your list.
3. Show a "Did you mean...?" prompt for common domain typos.
4. Clean old lists before you mail them, especially anything unused for six to twelve months.
5. Remove hard bounces immediately and never send to them again.
6. Watch soft bounces and suppress an address after several in a row.
7. Never buy or rent lists. They are full of dead and trap addresses.
8. Handle role accounts and catch-all domains separately.
9. Track bounce rate per campaign and set an alert when it rises.

How often should you clean your list?

Clean before every large campaign and at least every few months for an active list. Lists with high churn, such as B2B contacts, benefit from more frequent checks because people change jobs and mailboxes are removed.

Where address checking fits

Checking an address before you send removes the ones most likely to bounce. You can try it on a single address with our email checker.

How bounces affect deliverability and revenue

Inbox providers watch how many of your messages are rejected. A pattern of bounces suggests a careless list, and they respond by filtering your mail more aggressively. Better addresses mean better placement for every message you send, including the ones that reach real customers.

Bounces also cost money. Many email platforms charge by contact, so every dead address is a recurring fee for nothing. Removing them lowers your bill while it protects your reputation.

Find out where your bounces come from

1. Group your bounces by source: sign-up forms, imports, events, partners.
2. Look at the age of the addresses. Older contacts bounce more.
3. Compare campaigns. A sudden jump usually points to one list or one source.
4. Fix the worst source first. It is normally where most of the damage is.

A simple monthly routine

1. Export and remove every hard bounce from the last month.
2. Suppress addresses with repeated soft bounces.
3. Check contacts who have not engaged for a long time before you mail them again.
4. Review your sign-up sources and tighten the weakest one.
5. Note your bounce rate and compare it with last month.

Warning signs that your list needs attention

• Your bounce rate is creeping up from one send to the next.
• Open rates are falling even though your content has not changed.
• Your email platform has sent you a warning about list quality.
• Your contact count jumped after an import or a new sign-up source.
• You are seeing complaints from people who do not remember signing up.

If you recognise two or more of these, pause large sends, remove the addresses that have already bounced, and check the rest before you resume.