Within the email tracking area you may notice that a bounceback is labeled as a SOFT BOUNCEBACK or a HARD BOUNCEBACK. 


Hard Bounces


A hard bounce indicates a permanent reason an email cannot be delivered.  While there are many reasons an email address may hard bounce, these are some common reasons this could happen.

  • Recipient email address does not exist.
  • Domain name does not exist.
  • Recipient email server has completely blocked delivery.



Soft Bounces


Soft bounces typically indicate a temporary delivery issue to an address.  While there are many reasons an email address may soft bounce, these are some common reasons this could happen.

  • Mailbox is full (over quota).
  • Recipient email server is down or offline.
  • Email message is too large.