Solved

how to prevent telnet spoofing of internet email addresses with Exchange 2010

Posted on 2014-02-19
4
2,945 Views
1 Endorsement
Last Modified: 2014-02-19
is there a way to prevent someone from telnet to my exchange server on port 25 and sending an email from user1-that-exist@mydomain.com to user2-that-exist@mydomain.com?

everything I've read so far doesn't really stop this. any suggestions?

Thanks
1
Comment
Question by:stevebishop
  • 2
  • 2
4 Comments
 
LVL 37

Accepted Solution

by:
Jamie McKillop earned 500 total points
ID: 39870623
Hello,

You can follow the instructions in this article to prevent domain spoofing of your internal domains:

http://exchangepedia.com/2008/09/how-to-prevent-annoying-spam-from-your-own-domain.html

-JJ
1
 

Author Comment

by:stevebishop
ID: 39870945
JJ,

Thanks for the response, what would be the opposite of that command in case I needed to revert the change?

Get-ReceiveConnector “My Internet ReceiveConnector” | Get-ADPermission -user “NT AUTHORITY\Anonymous Logon” | where {$_.ExtendedRights -like “ms-exch-smtp-accept-authoritative-domain-sender”} | Remove-ADPermission


Would it be

Get-ReceiveConnector “My Internet ReceiveConnector” | Get-ADPermission -user “NT AUTHORITY\Anonymous Logon” | where {$_.ExtendedRights -like “ms-exch-smtp-accept-authoritative-domain-sender”} | Add-ADPermission

?

Thanks
0
 
LVL 37

Expert Comment

by:Jamie McKillop
ID: 39870952
You would run this command to revert back:

Get-ReceiveConnector “Name of your RCV connector” | Add-ADPermission -User “NT AUTHORITY\Anonymous Logon” -ExtendedRights “ms-Exch-SMTP-Accept-Authoritative-Domain-Sender”

-JJ
1
 

Author Comment

by:stevebishop
ID: 39871444
Thanks JJ,

Implemented the change, tested it and i'm not allow to do it anymore. Looks like its working!

Sbishop
0

Featured Post

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.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Exchange Server logs 5 37
Issue with mobile devices syncing with Exchange 2013 server 2 48
Exchange DAG - maintenance question/ query 2 23
Lync 2010 4 24
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 explains how to install and use the NTBackup utility that comes with Windows Server.
In this video we show how to create a mailbox database in Exchange 2013. We show this process by using the Exchange Admin Center. Log into Exchange Admin Center.: First we need to log into the Exchange Admin Center. Navigate to the Servers >> Data…
how to add IIS SMTP to handle application/Scanner relays into office 365.

776 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