Solved

Strange SMTP Connectors showing up

Posted on 2006-07-10
3
487 Views
Last Modified: 2012-08-14
I'm learning exchange 2003 and i've had two domains running on it for about 6 months. These are test domains and get very little traffic. This is exchange running on SBS 2003 BTW.

So i was looking under the first administration group today and under the server and queues i'm seeing two SMTP connectors that are trying to send out email as postmaster@mydomain.com.

Is this some kind of security issue on my part?

Thanks
helm
0
Comment
Question by:matt-helm
  • 2
3 Comments
 
LVL 104

Accepted Solution

by:
Sembee earned 250 total points
ID: 17076021
Those are NDRs. It means that messages have been sent to the server to non-valid addresses and have been bounced.
As long as the server is fully up to date (Windows 2003 SP1 and Exchange 2003 SP2), you can nip these in the bud very easily.

Filter unknown users: http://www.amset.info/exchange/filter-unknown.asp
Tarpit: http://support.microsoft.com/default.aspx?kbid=842851

Simon.
0
 

Author Comment

by:matt-helm
ID: 17076104
Excellent! Thanks!
0
 
LVL 104

Expert Comment

by:Sembee
ID: 17076120
Make sure that you do both - otherwise you could leave the server open to attack.

Simon.
0

Featured Post

PRTG Network Monitor: Intuitive Network Monitoring

Network Monitoring is essential to ensure that computer systems and network devices are running. Use PRTG to monitor LANs, servers, websites, applications and devices, bandwidth, virtual environments, remote systems, IoT, and many more. PRTG is easy to set up & use.

Question has a verified solution.

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

Utilizing an array to gracefully append to a list of EmailAddresses
Following basic email etiquette rules will help you write a professional email and achieve a good, lasting impression with your contacts.
In this video we show how to create an email address policy 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 Mail Flow…
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…

867 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

Need Help in Real-Time?

Connect with top rated Experts

21 Experts available now in Live!

Get 1:1 Help Now