University of Email by Pankaj Kumar
    Facebook Twitter Instagram
    Facebook Twitter Instagram
    University of Email by Pankaj Kumar
    Subscribe
    • CDP
    • Deliverability
      • Deliverability Issues
      • Email Bounce Error
    • Emarketing
    • Industry updates
    • Solutions
    • About
    University of Email by Pankaj Kumar
    Deliverability

    X.0.0 Email Bounce Error [Other undefined Status]

    Pankaj KumarBy Pankaj KumarDecember 24, 2021Updated:January 8, 2022No Comments2 Mins Read

    4.0.0 Email Bounce Error

    Reason

    Unknown issue: Delayed Message

    Because of an unknown issue the email message could not be delivered.

    How to fix?

    You’ll need to check misspellings or missing letters in your recipient’s email address, correct it if you find an error. Alternatively, contact your recipient in another way to confirm their email address.

    4.0.0 – Official definition from ITEF

    For the code that starts from 4.X.X

    A persistent transient failure is one in which the message as sent is valid, but persistence of some temporary condition has caused abandonment or delay of attempts to send the message. If this code accompanies a delivery failure report, sending in the future may be successful.

    For the code that starts from X.0.0

    Other undefined status is the only undefined error code. It should be used for all errors for which only the class of the error is known.

    5.0.0 Email Bounce Error

    Reason

    Unknown issue: Message Not Delivered

    Because of an unknown issue the email message could not be delivered.

    How to fix?

    You’ll need to check misspellings or missing letters in your recipient’s email address, correct it if you find an error. Alternatively, contact your recipient in another way to confirm their email address.

    5.0.0 – Official definition from ITEF

    For the code that starts from 5.X.X

    A permanent failure is one which is not likely to be resolved by resending the message in the current form. Some change to the message or the destination must be made for successful delivery.

    For the code that starts from X.0.0

    Other undefined status is the only undefined error code. It should be used for all errors for which only the class of the error is known.

    Post Views: 252
    4.0.0 5.0.0 bounce emailbounce X.0.0
    Pankaj Kumar
    • Website
    • Facebook
    • Twitter
    • LinkedIn

    Pankaj Kumar is a senior professional holding 10+ years of experience in CRM, Email Deliverability & Marketing Analytics, Deliverability Onboarding, Implementation, Deliverability Automations He has worked with a broad range of clients to provide strategic, data-driven guidance to increase email delivery, subscriber engagement and revenue. He also helps marketers through this blogs in preparing strategies, data analytics, deliverability, and CRM with a passion for helping email marketers exceed subscriber expectations. You may connect with him on LinkedIn at https://www.linkedin.com/in/kumarpankaj793/

    Related Posts

    What Should You Know About Email Blacklisting?

    June 22, 2024

    How To Solve Deliverability Problem With Orange.fr / Wanadoo.fr Domains

    June 15, 2024

    How to maintain a clean email list

    June 5, 2022

    Leave A Reply Cancel Reply

    Subscribe to University of Email

    * indicates required

    Most Viewed Posts
    1. Yahoo/AOL/Verizon Postmaster tool for Email Deliverability (132,045)
    2. What you should ask to your next Email Service Provider? Revealed (131,572)
    3. Transfer your email from Yahoo to Gmail (15,475)
    4. £183m GDPR Fine Levied against British Airways (12,045)
    5. What Should You Know About Email Blacklisting? (9,963)
    Total posts
    • 106posts
    Search UOE
    Things to do here
    • About
    • Questions
      • Activities
      • Ask a question
      • Categories
      • Profile
      • Tags
    Pankaj Kumar
    Pankaj Kumar
    Pankaj Kumar, Author at University of Email
    Facebook Twitter Instagram LinkedIn
    © 2025 University of Email. Designed by BirdServer Technologies.

    Type above and press Enter to search. Press Esc to cancel.

    Please wait...

    Subscribe to our newsletter

    Want to be notified when our article is published? Enter your email address and name below to be the first to know.
    SIGN UP FOR NEWSLETTER NOW