Solved

Strange SMTP Connectors showing up

Posted on 2006-07-10
3
491 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
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 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

Best Practices: Disaster Recovery Testing

Besides backup, any IT division should have a disaster recovery plan. You will find a few tips below relating to the development of such a plan and to what issues one should pay special attention in the course of backup planning.

Question has a verified solution.

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

Lotus Notes – formerly IBM Notes – is an email client application, while IBM Domino (earlier Lotus Domino) is an email server. The client possesses a set of features that are even more advanced as compared to that of Outlook. Likewise, IBM Domino is…
Follow this checklist to learn more about the 15 things you should never include in an email signature from personal quotes, animated gifs and out-of-date marketing content.
In this video we show how to create a Shared Mailbox 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 Recipients >> Sha…
This video shows how to quickly and easily add an email signature for all users on Exchange 2016. The resulting signature is applied on a server level by Exchange Online. The email signature template has been downloaded from: www.mail-signatures…

751 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