Back to search

SMTP Error Delivery Codes


When your email can not be delivered, the SMTP server returns a notification, which includes an error message, associated with the actual problem.

Each code is composed of three digits (X.X.X). The first digit reflects the status of the email message as below:
2: the email was sent successfully
4: means there was a temporary problem when sending the email (the email server may try to re-send it, or you may have to do so. This will depend on your server settings). Such error messages display as 4.X.X, where X.X are used in order to give more precise information about the error;
5: means there is a permanent/fatal error related to the email (the email address of the receiver does not exist, it doesn't accept emails from you, etc.). Such error messages display as 5.X.X, where X.X are used in order to give more precise information about the error.

More information on SMTP Error Codes can be found on the link below, or you can copy and paste the URL into your web browser: http://www.answersthatwork.com/Download_Area/ATW_Library/Networking/Network__3-SMTP_Server_Status_Codes_and_SMTP_Error_Codes.pdf

Was this answer helpful?      

Also Read

How to setup email filters in Horde
This tutorial assumes you've already logged in to Horde webmail. Now let's learn how to setup...
Why is my e-mail message with an attachment is sent repeatedly to recipients -...
When you send an e-mail message with a large attachment, you may experience situations where that...
How to delete an email account on your iPhone
This tutorial will show you how to delete an email account on your iPhone. 1 First, locate and...
My Computer keeps asking me for me Email Password.
You have typed in the incorrect password, you may have had caps lock on when typing in your...