What Happens If an Email Bounces
What email bounces mean, why they happen, and how to handle them safely in outbound campaigns.
Email bounces are a normal part of outbound.
What matters is how often they happen and how you respond.
What Is an Email Bounce
A bounce occurs when a receiving server rejects an email.
There are two main types:
Each has a different impact.
Hard bounces mean the email is undeliverable.
Common reasons:
The mailbox does not exist
The domain does not exist
Hard bounces are permanent.
If you continue sending to hard-bouncing addresses:
CSVgo marks these emails as invalid so they can be excluded.
Soft bounces are temporary failures.
Common reasons:
Soft bounces may resolve on their own.
Most sending tools will retry automatically.
Why Occasional Bounces Still Happen
Even with verification, bounces can occur because:
Mailboxes are deleted after verification
Sending infrastructure differs from verification probes
Zero bounces is not realistic.
Low bounce rates are the goal.
Acceptable Bounce Rates
General guidelines:
Under 2% is considered safe
Spikes above 3% should be investigated
CSVgo is designed to keep bounce rates within safe ranges when used correctly.
What to Do If an Email Bounces
Best practices:
Remove the email immediately
Do not re-import bounced addresses later
Bounced emails should never be reused.
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.
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
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