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Soft Bounce

Definition - What does Soft Bounce mean?

A soft bounce refers to any email message that is returned or bounces back due to any temporary availability issue with a recipient's mailbox or mail/domain server. It is a type of bounced email message that is visible or received only when the recipient is incapable of receiving the message.

Techopedia explains Soft Bounce

A soft bounce is primarily a delivery error email message that is automatically sent to an email sender.

A soft bounce occurs in the following situations:

  • The recipient’s mailbox is full and cannot receive more messages. The recipient must empty or make enough space in the mailbox.

  • The recipients email server is offline or currently unreachable. The sender, in this case, must wait.

  • The size of the email message is larger than base limits of the host's or recipient's email server/host/domain.

If an outgoing email encounters any of the above situations, the sender receives an auto-generated soft bounce message specifying the reasons why the message cannot be delivered at that time.

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