Our exchange server 2013 is sending lots of spams. We checked that server is not and open relay. It seems that one of the system or server is compromised and sending spams. How do i check the origin

Our exchange server 2013 is sending lots of spams. We checked that server is not and open relay. It seems that one of the system or server is compromised and sending spams. How do i check the origin of the SPAM. Where from it is generating?
Gaurav NagAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

mbkitmgrCommented:
Check also that you dont have a workstation on your domain that is infected with something that is generating the email
0
Adam BrownSr Solutions ArchitectCommented:
Make sure it's actually your Exchange server sending the spam, first. Get on your firewall and block Outgoing port 25 for everything but your mail server and/or spam filter. Once you have a rule to block it, you can check your firewall logs to determine which system is sending the spam (assuming it stops when you do this) by seeing which systems get flagged in the logs as being blocked against that rule.
1

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
mbkitmgrCommented:
Gaurav,  Is this still an issue?

  1. What evidence do you have indicating the spam is coming from your server
  2. If you have a sample email, have you checked the headers

Its possible that the email is spoofing your email address/es and is coming from somewhere else.
0
Seth SimmonsSr. Systems AdministratorCommented:
No comment has been added to this question in more than 21 days, so it is now classified as abandoned.

I have recommended this question be closed as follows:

Accept: Adam Brown (https:#a42119882)

If you feel this question should be closed differently, post an objection and the moderators will review all objections and close it as they feel fit. If no one objects, this question will be closed automatically the way described above.

seth2740
Experts-Exchange Cleanup Volunteer
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Exchange

From novice to tech pro — start learning today.