FAQs in this section
What is a bounce message and error code?
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 are Quarantined emails in Microsoft Outlook?
Why do I have to review and manage quarantined emails in Microsoft Outlook?
Where can I see my Quarantine email notifications?
Where can I review and manage Quarantined Emails in Microsoft?
How will I know if my emails have been quarantined?
How do I manage quarantined emails?
What does getting an Undelivered Mail Returned to Sender message mean?
Why are my emails being returned as undelivered?
What can I do to resolve undelivered email issues?
How do I prevent my emails from being returned as undelivered?
How do I know if my emails have bounced?

What are undelivered emails?

Undelivered emails are messages that fail to reach their intended recipients. This happens due to reasons such as an incorrect email address, the recipient’s inbox being full, or the sender’s email being blocked. When an email is undelivered, you typically receive a bounce-back notification explaining the reason for the delivery failure.
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