About Bounces

Email Bounce Types: Hard Bounce and Soft Bounce

A bounced email is rejected by an email server and it won’t reach the recipient’s inbox. 

Hard bounce rate is an important metric to your account reputation because it reduces campaign effectiveness. It causes future emails to land in spam folders because spam filters flag high hard bounced rates as potential spamming, and a high bounce rate may cause email providers to block your email domain entirely and add your IP address to blacklists.

The benchmark for bounce rate is 2%. Your account will be considered unhealthy when it exceeds 2%. If your bounce rate is over 5% or even higher, then it will be considered risky. 

Track your bounced rate under -> Settings -> Account Information -> Reputation Heath

Learn more about it:  Monitor your email domain reputation. 

  • A Hard bounce indicates an email that couldn’t be delivered due to a permanent error, such as the email being sent to an invalid address, the email provider having a strict email security filter, etc.
  • To protect your email reputation, when contacts are hard bounced on a campaign email, MailExpress excludes these contacts as recipients of future emails automatically. 
  • A Soft bounce indicates an email couldn’t be delivered because of a temporary problem with the recipients’ email server, such as the recipient’s mailbox is full, the email is too large, the server is undergoing some configuration changes, etc. 
  • Contacts who are soft-bounced are eligible to receive future emails from you. 

View Bounce Reasons 

Users can check bounce reasons for each bounced email in a campaign in their Individual Campaign Performance.

Click on Bounced

You will see a list of bounced emails and the reasons why each of them bounced. 


Commons Reasons for Bounces:

  • Hard bounces: This mailbox is disabled/unavailable/does not exist.
  • Soft bounces: Blocked due to spam content, the email account is over quota.


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