Common Email Delivery Errors

Email > EMail Errors

There are several errors concerning mail delivery that system administrators may see. The most common are described below.

If you mistype an email address, this will yield a delivery failure message as shown below:

Could not deliver message to the following recipient(s):
Failed Recipient: user@example_domain.com
Reason: Failed to connect to the recipients mail server. No MX records were found for the 'example_domain.com' domain.
Failed all attempts to connect to the recipients mail server.
Attempted to send the message to the following ip's: xxx.xxx.xxx.xxx

Another bounce message that you might see is:

"Failed four Attempts to connect to recipients mail server"
This means the Webail has made four attempts to connect to the remote email server to deliver mail but, a connection could not be established.
If you are sending mail to a user whose mailbox is full you will see this message returned to you:
Could not deliver message to the following recipient(s):
Failed Recipient: user@example_domain.com
Reason: The mailbox is full

If you are sending mail to a user whose domain has exceeded its disk space allocation, you will see this message returned to you:

Could not deliver message to the following recipient(s):
Failed Recipient: user@example_domain.com
Reason: The domain size limit has been exceeded

Error Messages for AOL senders:

DYN Blocks
 
421 DYN:T1
 
The IP address you are sending from has been temporarily rate limited due to lack of whitelisting, unexpected changes in volume, or poor IP reputation.
 
421 DYN:T2
 
The IP address you are sending from has been asked to delay email delivery to AOL due to a temporary issue with our mail system. This will be corrected by AOL and no changes should be necessary on your part. If the issue persists, feel free to open a support request with our postmasters.

 

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