getting spam from myself

Posted on 2009-02-20
Medium Priority
Last Modified: 2012-06-22
ok, i run a small network for a church/school.  we have about 300 users and we have our own exchange 2003 enterprise server in the building.  some of my users are getting spam from themselves.  the sender appears to be username@ourdomain.com so that it appears that mary smith is getting email from herself.

is there some way to stop this and if so, how?

Question by:crp0499
LVL 15

Accepted Solution

wantabe2 earned 1000 total points
ID: 23695822
Not really unless you buy & install some sort of mail filter to filter mail header information, etc. It sounds like you've been spoofed by spammers. If you could look/view the header information from the email that was delivered, it should give you an idea of what domain/public IP address these are coming from.
LVL 65

Assisted Solution

Mestha earned 1000 total points
ID: 23695833
This is a very common spammers trick.
Do you have any antispam software? It should be stopping this type of stuff, as long as you haven't whitelisted your own domain.


Author Comment

ID: 23695854
i can see the header and i found the IP it's coming from so I'm going to block that IP.  of course, they could move to an diff IP!

my sonicwall has antispam built in.  I'll see if I can turn it on.

Author Closing Comment

ID: 31549415
I implemented suggestions from both responders and believe I now have increased protection and I believe I have solved the problem that prompted the initial post.  Thanks to you both.

Expert Comment

ID: 23695941
You need to set up an SPF record for yourself.

That will tell you how to set up an spf record

That will tell you how to filter out senders who fail sender ID checks.

Featured Post

2017 Webroot Threat Report

MSPs: Get the facts you need to protect your clients.
The 2017 Webroot Threat Report provides a uniquely insightful global view into the analysis and discoveries made by the Webroot® Threat Intelligence Platform to provide insights on key trends and risks as seen by our users.

Question has a verified solution.

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

Are you looking for the options available for exporting EDB files to PST? You may be confused as they are different in different Exchange versions. Here, I will discuss some options available.
In this post, I will showcase the steps for how to create groups in Office 365. Office 365 groups allow for ease of flexibility and collaboration between staff members.
how to add IIS SMTP to handle application/Scanner relays into office 365.
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…
Suggested Courses

809 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