Solved

How do I stop a Mailer-Daemon?

Posted on 2008-10-02
2
9,060 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
[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 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

Create Professional Looking Email Signatures

Create "Professional HTML Email Signatures" with ease.
7 Day Money Back Guarantee if not 100% Satisfied.
Affordable - Try it out for 7 Days Totally Risk Free.
Installers provided for over 45 Email clients.
Both Windows & MAC Supported.
Highly Recommended!

Question has a verified solution.

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

Suggested Solutions

This process describes the steps required to Import and Export data from and to .pst files using Exchange 2010. We can use these steps to export data from a user to a .pst file, import data back to the same or a different user, or even import data t…
Find out what you should include to make the best professional email signature for your organization.
Established in 1997, Technology Architects has become one of the most reputable technology solutions companies in the country. TA have been providing businesses with cost effective state-of-the-art solutions and unparalleled service that is designed…
A short tutorial showing how to set up an email signature in Outlook on the Web (previously known as OWA). For free email signatures designs, visit https://www.mail-signatures.com/articles/signature-templates/?sts=6651 If you want to manage em…

738 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