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Original
2026-01-01
Modified
2026-03-10
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<p>A<strong>bounced email</strong>is an email that doesn’t reach one or more subscribers on your email list because the recipient’s inbox provider rejects it. A high number of bounced emails reduces your email deliverability, negatively affecting the performance of your email campaigns and<a>automated emails, or flows</a>.</p>
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<p>A<strong>bounced email</strong>is an email that doesn’t reach one or more subscribers on your email list because the recipient’s inbox provider rejects it. A high number of bounced emails reduces your email deliverability, negatively affecting the performance of your email campaigns and<a>automated emails, or flows</a>.</p>
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<p>Depending on why the delivery failed, there are 2 main types of email bounces:</p>
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<p>Depending on why the delivery failed, there are 2 main types of email bounces:</p>
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<ol><li><a><strong>Hard bounce:</strong></a>A hard bounce happens when an email can’t be delivered for a permanent reason, such as a misspelled email address or a recipient blocking your emails with a spam filter.</li>
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<ol><li><a><strong>Hard bounce:</strong></a>A hard bounce happens when an email can’t be delivered for a permanent reason, such as a misspelled email address or a recipient blocking your emails with a spam filter.</li>
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<li><strong><a>Soft bounce</a>:</strong>A soft bounce reflects a temporary issue on the recipient’s end, such as a down email server or a full inbox.</li>
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<li><strong><a>Soft bounce</a>:</strong>A soft bounce reflects a temporary issue on the recipient’s end, such as a down email server or a full inbox.</li>
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</ol><h2>How to prevent bounced emails</h2>
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</ol><h2>How to prevent bounced emails</h2>
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<p>To reduce the rate of bounced emails, try these strategies:</p>
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<p>To reduce the rate of bounced emails, try these strategies:</p>
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<ul><li><strong>Use double opt-in:</strong>After someone signs up for your email list, send a follow-up email that requires them to confirm their subscription before they start receiving marketing messages.</li>
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<ul><li><strong>Use double opt-in:</strong>After someone signs up for your email list, send a follow-up email that requires them to confirm their subscription before they start receiving marketing messages.</li>
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<li><strong>Watch out for spammy words:</strong>Words like “cash,” “deal,” “income,” or “credit” can trigger spam filters, so avoid using them in your email copy and<a>subject lines</a>.</li>
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<li><strong>Watch out for spammy words:</strong>Words like “cash,” “deal,” “income,” or “credit” can trigger spam filters, so avoid using them in your email copy and<a>subject lines</a>.</li>
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<li><strong>Sunset unengaged contacts:</strong>Keep potentially invalid email addresses off your list by regularly removing contacts who haven’t opened your emails in a certain period.</li>
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<li><strong>Sunset unengaged contacts:</strong>Keep potentially invalid email addresses off your list by regularly removing contacts who haven’t opened your emails in a certain period.</li>
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</ul><p>Klaviyo is a<a>marketing automation platform</a>that automatically suppresses any emails that have bounced more than 7x in a row, helping keep your email list fresh and relevant.</p>
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</ul><p>Klaviyo is a<a>marketing automation platform</a>that automatically suppresses any emails that have bounced more than 7x in a row, helping keep your email list fresh and relevant.</p>
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<p>To minimise the effect of bounced emails on your deliverability rate,<a>Klaviyo’s deliverability hub</a>offers a quick and easy way to monitor deliverability metrics and see what to act on, including:</p>
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<p>To minimise the effect of bounced emails on your deliverability rate,<a>Klaviyo’s deliverability hub</a>offers a quick and easy way to monitor deliverability metrics and see what to act on, including:</p>
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<ul><li>Your account’s overall deliverability score</li>
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<ul><li>Your account’s overall deliverability score</li>
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<li>Monthly bounce rates</li>
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<li>Monthly bounce rates</li>
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<li>Bounce rates for each of your campaigns</li>
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<li>Bounce rates for each of your campaigns</li>
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<li>The reason why your emails are bouncing, arranged according to different sources</li>
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<li>The reason why your emails are bouncing, arranged according to different sources</li>
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</ul><p><a>Sign up for Klavio</a>to maximise the reach of your marketing messages, making sure your emails always find their way to your audience.</p>
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</ul><p><a>Sign up for Klavio</a>to maximise the reach of your marketing messages, making sure your emails always find their way to your audience.</p>
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