Solved

How do I stop a Mailer-Daemon?

Posted on 2008-10-02
2
8,940 Views
Last Modified: 2013-12-06
A user in our organization is getting about 2500 Delivery Delayed messages in her inbox a day.  It appears that she's responsible for sending out these messages, but she's not.  She's receiving email bounce-back messages from a mailer-daemon that were not hers to begin with.  What is causing this problem and how do we stop it?  I have attached a copy of the error.  Thanks in advance.
Aarnold.doc
0
Comment
Question by:CityOfRome
2 Comments
 
LVL 97

Accepted Solution

by:
war1 earned 125 total points
ID: 22625045
Hello CityOfRome,

Looks like a spammer has spoofed the user address and sent out spam using the user's address in From field. When servers bounce the spam, the emails come back to the user.  There is not much you can do.  The spam attack subside after a couple of days.

Make sure your computer is not an open relay
http://www.postcastserver.com/help/Blocking_Open_Relays.aspx
and
http://support.microsoft.com/kb/324059

If you have control of the server, you can Integrate SPF and DomainKeys, which would help to stop spoofing in the future:

SPF:
http://www.openspf.org/

DomainKeys:
http://domainkeys.sourceforge.net/

Hope this helps!
war1
0
 

Author Closing Comment

by:CityOfRome
ID: 31502381
the links provided are to complex for beginners.  Expert should simplify how spf and domainkeys are used.
0

Featured Post

Control application downtime with dependency maps

Visualize the interdependencies between application components better with Applications Manager's automated application discovery and dependency mapping feature. Resolve performance issues faster by quickly isolating problematic components.

Question has a verified solution.

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

Encryption for Business Encryption (https://en.wikipedia.org/wiki/Encryption) ensures the safety of our data when sending emails. In most cases, to read an encrypted email you must enter a secret key that will enable you to decrypt the email. T…
Read this checklist to learn more about the 15 things you should never include in an email signature.
This Experts Exchange video Micro Tutorial shows how to tell Microsoft Office that a word is NOT spelled correctly. Microsoft Office has a built-in, main dictionary that is shared by Office apps, including Excel, Outlook, PowerPoint, and Word. When …
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…

919 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

22 Experts available now in Live!

Get 1:1 Help Now