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Delivery Failures Explained
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If you have ever gotten a message from postmaster@fridge.rr1.net with the subject of the line as Delivery Failure then you need to read this information. 

First, let's review how e-mail is sent and received. Just like when you send a letter through the U.S. Postal Service, there are times that e-mail cannot be delivered and it is 'returned to sender' as undeliverable.    When you send an e-mail out there are 2 basic parts to the e-mail address:    the Username  and the Domain Name.     

You would read a generic e-mail address as username@domainname.com  
(Everything to the left of the @ sign is the Username and everything to the right of the @ sign is the Domain Name).  

Your e-mail address is unique in all the world just like your mailing address for the U.S. Postal Service is unique in all the world.   This is how mail gets routed to your home or to your computer. 

You can think of a Domain as your local Post Office.   Everyone who has @rr1.net at the end of the e-mail address is getting their mail from Cumberland Internet.    When mail is sent to any user @rr1.net, all a computer has to do on the Internet is to get it to Cumberland Internet's servers (specialized computers) and then we put your specific mail in your specific mail folder on our server(specialized computer).

Your username is unique on each domain.  While there may be many user's named joe on the Internet, there will only be one with the address of joe@rr1.net , there will not be 2 identical e-mail addresses.

So why is my mail returned?

Normally a message bounces because of human error.   In other words a type-o.  You can type the e-mail address incorrectly so that either the username or the domain name are not typed correctly.    When a message is returned to you as undeliverable, it will say in the message why it was not delivered- You need to open the mail and read the reason to know why the mail was not delivered. 


Here are some examples:

User Not Known (or Unknown User)

If you open the Undeliverable Mail message, you will see a short description of the reason why your mail was returned to you. Immediately after that you'll see your original message so you know which message it was that was not delivered. 

This error indicates a problem with the e-mail address to which the message was sent. The problem is that the portion of the e-mail address before the @ symbol  (the USERNAME) has been rejected by the recipient's e-mail server as 'Not Known'.  Why would this happen?   Check the username part of the e-mail address that you sent the message to; you may have typed the USERNAME part of the address incorrectly.  If you have checked the USERNAME part of the address and it looks correct, the e-mail address may have been canceled and is no longer able to accept mail at that USERNAME.  Here is an  example of a returned e-mail because of user not known (or user unknown) - In other words, there is no user named mickeymouse on the rr1.net domain.
________________________________________________________________________
Your message has encountered delivery problems to local user mickeymouse.
(Originally addressed to mickeymouse@rr1.net) User not known

Your message reads (in part):
Received: from Debug (unverified [216.189.22.10]) by fridge.rr1.net
(EMWAC SMTPRS 0.83) with SMTP id <B0006665117@fridge.rr1.net>;
Tue, 19 Jun 2001 07:43:02 -0500 Message-ID: <B0006665117@fridge.rr1.net>
To: mickeymouse@rr1.net
From: suggestions@rr1.net
Subject: Test message to Mickey Mouse
Date: Tue, 19 Jun 2001 12:43:01 GMT
X-Mailer: Endymion MailMan Standard Edition v3.0.20

This is what I wrote in the body of the original e-mail to Mickeymouse@rr1.net
________________________________________________________________________


Unable To Deliver to Destination Domain

This error indicates a problem with the e-mail address to which the message was sent. The problem is that the portion of the e-mail address after the @ symbol (the DOMAIN NAME) has been rejected because there is no computer on the Internet that is in charge of that Domain Name.  Why would this happen?   Check the Domain Name part of the e-mail address that you sent the message to; you may have typed the Domain Name part of the address incorrectly.  If you have checked the Domain Name part of the address and it looks correct, you may have had written down the Domain Name down incorrectly when first got the e-mail address (for example, someone might write down RRONE.NET instead of RR1.net as our domain name). Here is an  example of a returned e-mail because of Unable to Deliver to Destination Domain - In other words, there is no computer on the Internet that is responsible for keeping track of the Domain to deliver e-mail to the address @norealdomainname.com ________________________________________________________________________

Your message has encountered delivery problems to the following recipients: mickeymouse@norealdomainname.com
Unable to deliver to destination domain  Cannot resolve norealdomainname.com

Your message reads (in part): Received: from Debug (unverified [216.189.22.10]) by fridge.rr1.net (EMWAC SMTPRS 0.83) with SMTP id <B0006665142@fridge.rr1.net>;
Tue, 19 Jun 2001 07:45:17 -0500 Message-ID: <B0006665142@fridge.rr1.net>
To: Mickeymouse@norealdomainname.com
From: suggestions@rr1.net
Subject: E-mail to Mickey Mouse at a Non-Real Domain address
Date: Tue, 19 Jun 2001 12:45:16 GMT
X-Mailer: Endymion MailMan Standard Edition v3.0.20

This is the body of the message that I sent with the original e-mail.
________________________________________________________________________


Unable To Deliver to Destination Domain after 54 tries

This error indicates a problem with the server (specialized computer) that is responsible for handling the mail for the domain listed (in this case Yahoo.com).  What has happened is that the mail that Cumberland Internet is trying to deliver to Yahoo has not been delivered because the Yahoo Mail server is not working temporarily.   This is a common problem with the 'free' e-mail accounts (like hotmail.com and yahoo.com).  When their e-mail servers are not working - mail cannot be delivered to them from anybody on the Internet and the e-mail will be returned to the sender after trying 54 times to deliver the mail.   Here's an example of what the returned e-mail looks like when the error message is Unable to Deliver to Destination Domain - In this example, Yahoo's e-mail is 'broken' and is not able to receive mail despite our repeated attempts to deliver it.
________________________________________________________________________

Your message has encountered delivery problems to the following recipients: superman@yahoo.com Unable to deliver to destination domain
Failed to deliver to domain yahoo.com after 54 tries

Your message reads (in part): Received: from Debug (unverified [216.189.22.10]) by fridge.rr1.net (EMWAC SMTPRS 0.83) with SMTP id <B0006665149@fridge.rr1.net>;
Tue, 19 Jun 2001 07:54:19 -0500 Message-ID: <B0006665149@fridge.rr1.net>
To: superman@yahoo.com
From: suggestions@rr1.net
Subject: E-mail sent to Yahoo
Date: Tue, 19 Jun 2001 12:54:19 GMT
X-Mailer: Endymion MailMan Standard Edition v3.0.20

This is the body of the message that I sent with the original e-mail.
_________________________________________________________________
_______
 

Cumberland Internet, Inc
P.O. Box 190 Greenup, IL 62428
Phone: 217-923-5115  Fax 217-923-3726 
24 hour information line 217-923-3515
copyright © 1996 Cumberland Internet, Inc.

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