Author: Pankaj Kumar

4.1.6 Email Bounce Error Reason Email Address No Longer Accepts Or Forwards Messages: Delayed Message The recipient’s email address no longer accepts email messages and so the email message has not yet been delivered (even though it did in the past). How to fix? Check the recipient’s email address for misspellings or missing letters. If an error is found, correct it in contacts list or address book for next time. 4.1.6 – 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…

4.1.5 Email Bounce Error Reason Valid Email Address: Delayed Message The email message has not yet been delivered even though the recipient’s email address is a valid email address. How to fix? If the email address you’re using is correct and your recipient can receive emails to their inbox, then you could contact the email provider for help. 4.1.5 – 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…

4.1.4 Email Bounce Error Reason Multiple Mailboxes For Recipient: Delayed Message The recipient’s email address belongs to more than one email inbox and their email provider is confused which one to use and so email message has not yet been delivered. How to fix? Check the recipient’s email address for misspellings or missing letters. If an error is found, correct it in contacts list or address book for next time. If necessary, contact the recipient another way to confirm their email address. 4.1.4 – Official definition from ITEF For the code that starts from 4.X.X A persistent transient failure is…

4.1.3 Email Bounce Error Reason Email Address Malformed: Delayed Message The recipient’s email address is not a valid email address and so email message has not yet been delivered. How to fix? Check the recipient’s email address for spaces or unusual characters. If an error is found, correct it in contacts list or address book for next time. If necessary, contact the recipient another way to confirm their email address. 4.1.3 – 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…

4.1.2 Email Bounce Error Reason Domain Name Of Email Address Not Valid: Delayed Message Because the recipient’s email provider says that the recipient’s email address does not exist or unable receive email, the email message has not yet been delivered How to fix? Check the recipient’s domain name in the recipient’s email address for misspellings or missing letters. If an error is found, correct it in contacts list or address book for next time. If necessary, contact the recipient another way to confirm their email address. 4.1.2 – Official definition from ITEF For the code that starts from 4.X.X A…

4.1.1 Email Bounce Error Reason User Name In Email Address Not Valid: Delayed Message Mailbox of the recipient’s email address is invalid or doesn’t exist and due to this message not yet delivered. How to fix? Check the username part (that means before ‘@’ of an email address) of the recipient’s email address for misspellings or missing letters. If an error is found, correct it in contacts list or address book for next time. If the address looks correct, there might be an issue with the recipient’s domain. If necessary, contact the recipient another method to confirm their email address.…

4.1.0 Email Bounce Error Reason Unknown Issue With Recipient’s Email Address: Delayed Message The email message has not yet been delivered because there is a problem of some sort with the recipient’s email address. 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. 4.1.0 – 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…

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.…

Not all the time email gets delivered due to multiple bounce reasons. There are certain number of bounce reasons due to which an email fails to reach into the inbox. Here is the collection of all possible email bounces as per RFC standard. (only system related – we will not be talking about IP/domain blocks kind of bounces in this article). There are certain structure of SMTP error code. This code is defined in such way that we bounces can be in an order representing their meaning. Status Code Structure defines a new set of status codes to report mail…

Think once, none of your mail is going through to a major mailbox provider (MBP). Instead of the bounce rates, open rates, click-throughs you’re used to, you see a steep decline in performance. Worse, you might see the MBP comprising the majority of your list returning a big, fat goose egg. Chances are you’ve been blocklisted. A complicated journey awaits you. Here’s what you’ll need to know to understand what a blocklist is and does, how you landed on it in the first place, whether you need to quickly remedy the situation, and how you avoid this happening in the…