Solved

Need to close exchange 2010 Open Relay  HELP!

Posted on 2011-09-09
7
744 Views
Last Modified: 2012-05-12
I have an emergent need with exchange 2010 acting as an open relay.  I have checked all the settings through the EMC and they look good.  I have issued the following command on all the receive connectors and it either remove the access or said there was no ACL.  Get-ReceiveConnector “Windows SBS Internet Receive SMSCORPVS0SBS” | Remove-ADPermission -User “NT AUTHORITY\ANONYMOUS LOGON” -ExtendedRights “ms-Exch-SMTP-Accept-Any-Recipient” .  It is still showing it as open.  Any help please!
0
Comment
Question by:sidelogic
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
7 Comments
 

Author Comment

by:sidelogic
ID: 36511886
the server has two receive connectors, the default and the Windows SBS Internet Receive.  Not sure which it is actually using as a relay.
0
 
LVL 7

Expert Comment

by:JohnGrunwell
ID: 36511926
did you check the send connector this is what allows someone to send through your server
0
 
LVL 17

Expert Comment

by:Viral Rathod
ID: 36511965
Since enabling anonymous relaying on the default receive connector is a huge security issue ,i have suggest you to create separate receive connector

Here is an article wrote by Akhater that will guide you through it step by step
http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/A_2666-Allow-relaying-on-Exchange-2007-Exchange-2010-in-4-easy-steps.html 
0
Are your AD admin tools letting you down?

Managing Active Directory can get complicated.  Often, the native tools for managing AD are just not up to the task.  The largest Active Directory installations in the world have relied on one tool to manage their day-to-day administration tasks: Hyena. Start your trial today.

 
LVL 12

Expert Comment

by:FarWest
ID: 36511996
you can check the accepted domains  value
0
 

Author Comment

by:sidelogic
ID: 36512059
I can telnet through the public IP to port 25 and send as anyone from any domain.  I need to stop this.  Where is the accepted domains value you are talking about?  What am I checking on the send connector?  It looks the same as all our other clients that are not open relay.
0
 
LVL 12

Accepted Solution

by:
FarWest earned 500 total points
ID: 36512140
check this url to know about accepted domains and how its effect
http://technet.microsoft.com/en-us/library/bb124423.aspx

and this how you can change it
http://technet.microsoft.com/en-us/library/bb124745.aspx

good luck
0
 

Author Closing Comment

by:sidelogic
ID: 36512235
That was it.  Internal relay was setup with accepted domain of *
0

Featured Post

Free Tool: SSL Checker

Scans your site and returns information about your SSL implementation and certificate. Helpful for debugging and validating your SSL configuration.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

MS Outlook is a world-class email client application that is mainly used for e-communication globally.  In this article, we will discuss the basic idea about MS Outlook, its advanced features, and types of MS Outlook File formats.
This article aims to explain the working of CircularLogArchiver. This tool was designed to solve the buildup of log file in cases where systems do not support circular logging or where circular logging is not enabled
In this video we show how to create a Resource Mailbox in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: Navigate to the Recipients >> Resources tab.: "Recipients" is our default selection …
To add imagery to an HTML email signature, you have two options available to you. You can either add a logo/image by embedding it directly into the signature or hosting it externally and linking to it. The vast majority of email clients display l…
Suggested Courses

636 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question