<div>
<div class="content wysiwyg-content">
One user in my company reported me an error when he's trying to send an e-mail for a mailing list.<br />
<br />
Error: <br />
<br />
teste@teste.pt on 17-07-2008 12:07<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; You do not have permission to send to this recipient. &nbsp;For assistance, contact your system administrator.<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &lt;CESCESMTP01.cescesi.pt #5.7.1 smtp;550 5.7.1 Unable to relay for teste@teste.pt - reinject host refused rcpt to: - psmtp&gt;<br />
<br />
The user is trying to send an e-mail for about 50 different destinations at the same time.<br />
<br />
Do you an answer to solve this problem?<br />
<br />
Thank you !<br />
<br />

</div>
</div>


One user in my company reported me an error when he's trying to send an e-mail for a mailing list.

Error: 

teste@teste.pt on 17-07-2008 12:07
            You do not have permission to send to this recipient.  For assistance, contact your system administrator.
            <CESCESMTP01.cescesi.pt #5.7.1 smtp;550 5.7.1 Unable to relay for teste@teste.pt - reinject host refused rcpt to: - psmtp>

The user is trying to send an e-mail for about 50 different destinations at the same time.

Do you an answer to solve this problem?

Thank you !



Error sending e-mails to a mailing list

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

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.