?
Solved

Identifying Source of SPAM

Posted on 2011-03-11
4
Medium Priority
?
262 Views
Last Modified: 2012-08-13
I was having a problem with mail queues on my Exchange server filling up with unidentified mail.  By increasing the logging on my Exchange server, I was able to identify which host is sending the mail.  What would be the best way to go about identifying what on that host is sending the mail?
0
Comment
Question by:gtkdw
4 Comments
 
LVL 5

Expert Comment

by:sweeps
ID: 35112438
you can try http://www.mxtoolbox.com it is a blacklist site but give you alot of information.  that is a good place to start.  and this site will give you some information on the site.  http://www.networksolutions.com/whois/index.jsp
0
 

Author Comment

by:gtkdw
ID: 35112537
To clarify - the host that is pushing the mail to my Exchange server is on my network.  I am looking for the best way to identify what on that host is sending the mail.
0
 
LVL 76

Expert Comment

by:Alan Hardisty
ID: 35113458
You can download and install Wireshark and then run a network trace to see what is happening on your network and then filter port 25 traffic and see where the traffic is coming from.

http://www.wireshark.org/

Are you sure the host is internal and not an external host using your server as an authenticated relay?  That is the more usual source of spam and my article might help you with this:

http://www.experts-exchange.com/Software/Server_Software/Email_Servers/Exchange/A_2556-Why-are-my-outbound-queues-filling-up-with-mail-I-didn't-send.html

Alan
0
 
LVL 23

Accepted Solution

by:
Suliman Abu Kharroub earned 1000 total points
ID: 35113981
Check the machine for viruses.

also you can check for any process sending emails on port 25:
-Close outlook and any mail clients apps.
-run  " netstat -a -n -o"
-search for Foreign ports 25
-identify the process on the task manager..
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say 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

Steps to fix error: “Couldn’t mount the database that you specified. Specified database: HU-DB; Error code: An Active Manager operation fail”
There can be many situations demanding the conversion of Outlook OST files to PST format and as such, there is no shortage of automated tools to perform this conversion. However, what makes Stellar OST to PST converter stand above the rest? Let us e…
In this video we show how to create an Address List 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 Organization >> Ad…
Exchange organizations may use the Journaling Agent of the Transport Service to archive messages going through Exchange. However, if the Transport Service is integrated with some email content management application (such as an antispam), the admini…
Suggested Courses
Course of the Month17 days, 4 hours left to enroll

864 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