Solved

Mail bounced back for Exchange 2003

Posted on 2008-10-29
1
222 Views
Last Modified: 2013-11-22
Some of the emails to recipents are classified as spam and couldn't be delivered. I'm using Exchange 2003. How can I vertify that my Exchange 2003 doesn't send out any spam emails.

Any suggestion to identify the problem as I find my IP drops in the blacklist again even though I have requested to take it up. Any suggestion on this ??

Thanks
0
Comment
Question by:AXISHK
[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
1 Comment
 
LVL 14

Accepted Solution

by:
Hedley Phillips earned 500 total points
ID: 22830310
Is this emails sent from your Exchange server to external recipients are being bounced?

Sounds like it is a case of spoofing. You won't get blacklisted as the lists aren't fooled by a spoofed sender.

But just to make sure:

You could also set it to not accept messages for non existant users:

http://www.amset.info/exchange/filter-unknown.asp

and run through these:

a) Check the mail smtp queues in Exchange System Manager to see if there is unusual activity.

b) Do a DNS test at http://member.dnsstuff.com/pages/dnsreport.php

c) See if you are blacklisted at http://www.robtex.com/

d)  In case you need to secure your server:
http://technet.microsoft.com/en-us/library/bb123843.aspx
http://www.microsoft.com/technet/security/prodtech/exchangeserver/excrelay.mspx
0

Featured Post

Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

How to resolve IMCEAEX NDRs in Exchange or Exchange Online related to invalid X500 addresses.
In-place Upgrading Dirsync to Azure AD Connect
Email security requires an ever evolving service that stays up to date with counter-evolving threats. The Email Laundry perform Research and Development to ensure their email security service evolves faster than cyber criminals. We apply our Threat…
There are cases when e.g. an IT administrator wants to have full access and view into selected mailboxes on Exchange server, directly from his own email account in Outlook or Outlook Web Access. This proves useful when for example administrator want…

689 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