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I have recently upgraded our exchange server to 2010 things are working well but some external programs still can not use the server to send out emails using smtp. What is going on is that the external programs are trying to send emails to usernames only and SMTP is denying it calling them invalid users. what I need to find out if there is a way to have all aliased sends to append them with @domain.com before checking to see if they are valid. &nbsp;Also in forsight I will need to adjust the from recipient as well. <br />
<br />
from the command line I can recreate the problem:<br />
220 mail.domain.com Microsoft ESMTP MAIL Service ready at Wed, 25 Aug 2010 09:25:35 -0700<br />
HELO<br />
250 mail.domain.com Hello [192.168.0.225]<br />
mail from: user@domain.com<br />
250 2.1.0 Sender OK<br />
rcpt to: user@domain.com<br />
250 2.1.5 Recipient OK<br />
rcpt to: user<br />
501 5.1.3 Invalid address<br />
<br />
I would like to tell the admins of the machines to fully qualify the email address but they say they aare not in control of that aspect. <br />
<br />
<br />
thanks in advance. <br />
<br />

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I have recently upgraded our exchange server to 2010 things are working well but some external programs still can not use the server to send out emails using smtp. What is going on is that the external programs are trying to send emails to usernames only and SMTP is denying it calling them invalid users. what I need to find out if there is a way to have all aliased sends to append them with @domain.com before checking to see if they are valid.  Also in forsight I will need to adjust the from recipient as well. 

from the command line I can recreate the problem:
220 mail.domain.com Microsoft ESMTP MAIL Service ready at Wed, 25 Aug 2010 09:25:35 -0700
HELO
250 mail.domain.com Hello [192.168.0.225]
mail from: user@domain.com
250 2.1.0 Sender OK
rcpt to: user@domain.com
250 2.1.5 Recipient OK
rcpt to: user
501 5.1.3 Invalid address

I would like to tell the admins of the machines to fully qualify the email address but they say they aare not in control of that aspect. 


thanks in advance. 



exchange 2010 smtp connector needs to append @domain.com for aliases

Interactions between email servers and clients are governed by email protocols. The three most common email protocols are POP, IMAP and MAPI. Most email software operates under one of these (and many products support more than one).  The correct protocol must be selected, and correctly configured, if you want your email account to work.

Email Protocols

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Within Internet message handling services (MHS), a message transfer agent or mail transfer agent (MTA) or mail relay is software that transfers electronic mail messages from one computer to another using a client–server application architecture. A MTA implements both the client (sending) and server (receiving) portions of the Simple Mail Transfer Protocol (SMTP). The terms mail server, mail exchanger, and MX host may also refer to a computer performing the MTA function. The Domain Name System (DNS) associates a mail server to a domain with mail exchanger (MX) resource records containing the domain name of a host providing MTA services.