Solved

Blocking Inbound SMTP Traffic to Exchange

Posted on 2003-11-14
5
221 Views
Last Modified: 2010-05-18
At our company we have starting getting a problem with spam maessages. Although our inbound e-mails are scanned by an external company first and then forwarded on, an examination of the headers of the spam reveal that they are bypassing the scanning at appearing directly on the public address of our Exchange 2000 server. I have the IP addresses of the external filters so in theory what I need to do is block all inbound SMTP traffic at the firewall unless it is coming from these two addresses.

However for operational reasons, I'd rather get the Exchange server to do this if possible. I don't mind what happens to mail from 'unwanted' addresses as long as the SMTP packets get dropped. Is it even possible to do this from within Exchange and if so how?

Many thanks
0
Comment
Question by:jem99
  • 2
5 Comments
 
LVL 57

Accepted Solution

by:
Pete Long earned 125 total points
ID: 9749126
Blocking a Domain or a user From Exchange 2000

1. On the Exchange server open the Exchange System Manager (If you cant find it click Start > Run > type MMC >Press OK. Press Console > Add/Remove Snapin > Add > select Exchange System > Add >At the confirm window Press OK > Press OK)

2. Expand "Global Settings" till you can see "Message Delivery". Right click it and select properties.

3. Select the Filtering Tab.

4. Select add to enter the offending domain or user.

    Syntax ...

    *@domainname.com (Blocks a domain)
    *@*.domainname.com (Blocks a Domain and All sub Domains)
    username@domainname.com (Blocks an individual user)

5. When done click OK.

6. There are three tick boxes at the bottom DONT tick the top one this logs the mail to the Server and will build up over time. Tick the second one, this will filter EMails with a blank header. The Last One (If unticked) will EMail the sender back to say they have been blocked - leave this ticked.

7. The following steps *****SHOULD ONLY BE DONE ONCE!!!!! ******
(The first time you set up filtering)

8. For the next few steps you need to find out which server is "connecting out" - Usually this is The server you are on, however if you have another server running Mailsweeper for example you will need to do this there. Depending on your Setup, On my network its set on the same server.

9.Expand Administrative Groups > First Administrative Group > Servers > Servername > Protocols > SMTP > Default SMTP Virtual Server, and right click it.

10. On the General Tab, Click Advanced. You should see your EMail connection here, Click Edit.

11. Tick Apply Filter "If you cant see Apply Filter" Your on the wrong Server.
0
 
LVL 57

Expert Comment

by:Pete Long
ID: 11145135
Hello this question has been open a while please take the time to come back and clean it up.

Closing Questions
http://www.experts-exchange.com/help.jsp#hs5


Best Wishes

Pete
www.petenetlive.com
0

Featured Post

Ransomware-A Revenue Bonanza for Service Providers

Ransomware – malware that gets on your customers’ computers, encrypts their data, and extorts a hefty ransom for the decryption keys – is a surging new threat.  The purpose of this eBook is to educate the reader about ransomware attacks.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Virtualise server 2000 for Hyper V 4 861
Window 2000 server in a SBS2011 domain DNS Errors 4 472
Install Window 2012 Domain on 9 137
Windows  Active Directory  Quesiton 8 132
NTFS file system has been developed by Microsoft that is widely used by Windows NT operating system and its advanced versions. It is the mostly used over FAT file system as it provides superior features like reliability, security, storage, efficienc…
Adults who share images on social media aren’t the only ones who need to worry about their privacy. Our culture’s tendency to share every move and celebration affects the privacy of our children, too.
With Secure Portal Encryption, the recipient is sent a link to their email address directing them to the email laundry delivery page. From there, the recipient will be required to enter a user name and password to enter the page. Once the recipient …
A short tutorial showing how to set up an email signature in Outlook on the Web (previously known as OWA). For free email signatures designs, visit https://www.mail-signatures.com/articles/signature-templates/?sts=6651 If you want to manage em…

679 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