UNDELIVERABLE MAIL
InterNet Access Network ( )
Fri, 23 Apr 1999 11:43:04 -0400
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>Internet Tip of the Day:
>
>UNDELIVERABLE MAIL
>
>Occasionally when retrieving your email messages, you may
>notice a message with a subject of "undeliverable mail" or
>something similar. Messages of these types are often sent
>to let us know that one of our previous emails could not
>be properly delivered. By examining the email, the reason for
>nondelivery can be determined.
>
>Email addresses are always in the form of .
>Let's break the email address into it's three parts to help us
>better understand delivery problems.
>
>The first part of the address is the user's name, often referred
>to as the username. In this case the username is 'jdoe'.
>
>The '@' sign is the second part of an email address and divides
>the first part from the third part (I bet you had that already
>figured out)!
>
>The last part of an email address is the name of the system
>where the user's email box resides. In our example, jdoe's
>email box resides on the system (or host computer) known
>on the Internet as 'terragon.com'.
>
>The majority of the time, you will see one or two error
>messages. Different email systems have different wording,
>but they usually refer to the same thing. The first is:
>
>unknown user:
>
>This error message means that there is a system/host
>named terragon.com, but there is not a user/email box
>named jdoe on that host. Either the person no longer
>has an email box on that system, or perhaps you might
>have misspelled it when you originally typed it in your
>email.
>
>The second message is:
>
>unknown host:
>
>This means that an attempt was made to deliver your
>message to a mailbox at terragon.com, but the system
>could not be found. Most often this message simply means
>you mistyped the system/host name.
>
>For example, if you meant to send an email to a friend at
>compuserve.com, but you accidently typed the host name
>as cmopuserve.com, you might get a message back saying
>"unknown host."
>
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>Web Site of the Day:
>
>For more information about how email works, read the
>Scientific American article:
>
>http://www.sciam.com/1998/0398working.html
>
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>(C) 1999 Terragon Media.
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Dayton, OH