<div>
Have you attempted using the UPN of the account to log in? Or using the domain\username format?
</div>


Have you attempted using the UPN of the account to log in? Or using the domain\username format?

<div>
<div class="content wysiwyg-content">
I am trying to send email through an application on the server. <br />
<br />
From: ABC<br />
Reply to: my@companydomain.com<br />
Domain: internal<br />
Host: &nbsp;exchange.internal.com<br />
<br />
user: db.admin<br />
password: password for this ad account <br />
<br />
I get following error on test email: <br />
<br />
<b>javax.mail.AuthenticationF<wbr />ailedExcep<wbr />tion: 535 5.7.3 Authentication unsuccessful </b><br />
<br />
It looks like I am not able to authenticate using this account db.admin ? or is it something else ?<br />
I am running exchange 2010. <br />
<br />
Could it be the possibiltiy that this account is not authorized to use SMTP relay ? &nbsp;If yes, where in exchange 2010 exactly I can go and see all the accounts those are authorized ?<br />
<br />
Thank you!
</div>
</div>


I am trying to send email through an application on the server. 

From: ABC
Reply to: my@companydomain.com
Domain: internal
Host:  exchange.internal.com

user: db.admin
password: password for this ad account 

I get following error on test email: 

javax.mail.AuthenticationFailedException: 535 5.7.3 Authentication unsuccessful 

It looks like I am not able to authenticate using this account db.admin ? or is it something else ?
I am running exchange 2010. 

Could it be the possibiltiy that this account is not authorized to use SMTP relay ?  If yes, where in exchange 2010 exactly I can go and see all the accounts those are authorized ?

Thank you!

Getting error sending email through internal company mail server. Please help

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.

Email Servers

Windows Server 2012 is the server version of Windows 8 and the successor to Windows Server 2008 R2. Windows Server 2012 is the first version of Windows Server to have no support for Itanium-based computers since Windows NT 4.0. Windows Server 2012, now in its second release (Windows Server 2012 Release 2) includes Foundation, Essentials, Standard and Datacenter, and does not support IA-32 or IA-64 processors.