<div>
You need to check your receive connector permissions group. Make sure that Anonymous is NOT selected.<br />
<br />
Will.
</div>


You need to check your receive connector permissions group. Make sure that Anonymous is NOT selected.

Will.

<div>
If leaving this option unchecked will that impact any mail flow from the internet to me?
</div>


If leaving this option unchecked will that impact any mail flow from the internet to me?

<div>
No it will not it will not. Although I do not know your environment you can simply re-enable it if it does. However it should not affect anything,<br />
<br />
Will.
</div>


No it will not it will not. Although I do not know your environment you can simply re-enable it if it does. However it should not affect anything,

Will.

<div>
Second thought, it might affect internal application servers that are sending email notifications without using authentication. However from the INTERNET it do you have a smart host? If you do then it might affect that as well. <br />
<br />
Best option is to create a new receive connector and lock it down via IP address under the networking tab and then allow anonymous permission group. It will be locked down via IP. <br />
<br />
Do not do this on your DEFAULT receive &nbsp;connector.<br />
<br />
Will.
</div>


Second thought, it might affect internal application servers that are sending email notifications without using authentication. However from the INTERNET it do you have a smart host? If you do then it might affect that as well.

Best option is to create a new receive connector and lock it down via IP address under the networking tab and then allow anonymous permission group. It will be locked down via IP.

Do not do this on your DEFAULT receive  connector.

Will.

<div>
1. I don't have a smart host. <br />
2. that was my default receive connector.
</div>


1. I don't have a smart host.
2. that was my default receive connector.

<div>
Well just remove the setting and see if anything happens. Preferably after hours.<br />
<br />
Will.
</div>


Well just remove the setting and see if anything happens. Preferably after hours.

Will.

<div>
Will <br />
<br />
I ran a test last night with that option unchecked, all mails flow from the internet rejected.
</div>


Will

I ran a test last night with that option unchecked, all mails flow from the internet rejected.

<div>
<div class="content wysiwyg-content">
Hello, <br />
<br />
I just setup an exchange 2007 test mail server, I came across this website to run a smtp test on my mail server. I ran a test without providing any authentication credential which startled me. Can anyone tell me where in the configuration that i missed that will allow mail to send without authentication? <br />
<br />
<a href="http://smtper.sweetylife.com/" rel="ugc">http://smtper.sweetylife.com/</a>
</div>
</div>


Hello, 

I just setup an exchange 2007 test mail server, I came across this website to run a smtp test on my mail server. I ran a test without providing any authentication credential which startled me. Can anyone tell me where in the configuration that i missed that will allow mail to send without authentication? 

http://smtper.sweetylife.com/

smtp misconfiguration?

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

Networking is the process of connecting computing devices, peripherals and terminals together through a system that uses wiring, cabling or radio waves that enable their users to communicate, share information and interact over distances. Often associated are issues regarding operating systems, hardware and equipment, cloud and virtual networking, protocols, architecture, storage and management.

Networking

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.