FAQs in this section
What are different bounce categories?
What are the different error codes?
What are the different traditional bounce codes?
What are the different enhanced bounce codes?
Can I customize the bounce messages?
I need a detailed report regarding a bounce message. How can I get it?
What is a hard bounce?
What is a general bounce?
What is a 'DNS failure' error?
What is a 'Mailbox full' error?
What is a 'Message too large' error?
What is a 'Mail block - relay denied' error?
What is a 'Mail block - general' error?
What is a 'Mail block - spam detected' error?
What is a transient bounce?
What is a challenge or response bounce?
What is a 'Bounce - no email address returned' error?

What is a bounce message and error code?

Email messages are transferred between mail servers using a process called Simple Mail Transfer Protocol (SMTP). If there is an error during the transmission, a Delivery Status Notification (DSN), also known as a bounce message, is returned to the sending server explaining why the email was not delivered.
To know more about Email Bounces and Error Codes, click here.
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