# What Happens If an Email Bounces

Email bounces are a normal part of outbound.

What matters is **how often they happen** and **how you respond**.

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### What Is an Email Bounce

A bounce occurs when a receiving server rejects an email.

There are two main types:

* Hard bounces
* Soft bounces

Each has a different impact.

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### Hard Bounces

Hard bounces mean the email is undeliverable.

Common reasons:

* The mailbox does not exist
* The domain does not exist
* The address is invalid

Hard bounces are permanent.

If you continue sending to hard-bouncing addresses:

* Sender reputation drops
* Inbox placement suffers
* Domains can get blocked

CSVgo marks these emails as invalid so they can be excluded.

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### Soft Bounces

Soft bounces are temporary failures.

Common reasons:

* Mailbox is full
* Temporary server issues
* Rate limits
* Greylisting

Soft bounces may resolve on their own.

Most sending tools will retry automatically.

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### Why Occasional Bounces Still Happen

Even with verification, bounces can occur because:

* Mailboxes are deleted after verification
* Servers change behavior
* Security rules update
* Sending infrastructure differs from verification probes

Zero bounces is not realistic.

Low bounce rates are the goal.

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### Acceptable Bounce Rates

General guidelines:

* Under 2% is considered safe
* Under 1% is ideal
* Spikes above 3% should be investigated

CSVgo is designed to keep bounce rates within safe ranges when used correctly.

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### What to Do If an Email Bounces

Best practices:

* Remove the email immediately
* Do not retry manually
* Do not re-import bounced addresses later

Bounced emails should never be reused.

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### How CSVgo Reduces Bounces

CSVgo helps by:

* Removing invalid addresses upfront
* Validating catch-all domains
* Separating ESPs for safer sending
* Allowing conservative export strategies

This reduces both hard and soft bounces at scale.

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### Key Takeaway

Bounces are signals, not failures.

Handled correctly:

* They protect your infrastructure
* They improve long-term deliverability

CSVgo is built to minimize bounce risk and make those signals actionable.

Is Email Verification