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Soft Bounce Definition - What is Soft Bounce?

Soft Bounce happens when an email cannot be delivered due to a problem in the receiver's server. If the email cannot reach the targeted inbox within and after 72 hours, it becomes a hard bounce.

Soft bounces typically indicate a temporary delivery issue and are handled differently than hard bounces by Mailchimp. When an email address soft bounces, it will immediately display as a soft bounce in the campaign report.

If an email address continues to soft bounce, the address will be considered a hard bounce in the end and must be cleaned from your email list.

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Here are some common reasons for soft bounces:

  • Mailbox of subscriber exceeds quota.
  • Recipient email server is down or offline.
  • Email message is too large to send.