spoofing email issue

my mail server is open. some people are using telnet 25 on mail.xxx.com and send me email using my email address.

At this moment telnet mail.xxx.com 25 never ask any authentication or access denied message and allow to send email to any body from outside.
What shall I do to block this from my exchange 2010 server.  

Kindly give me suggetions and steps to take action

Regards
j
swatujctAsked:
Who is Participating?
 
Simon Butler (Sembee)ConsultantCommented:
That is standard spoofing, nothing you can do about it other than using an anti-spam tool.
SMTP is anonymous and by its very nature doesn't check the from value at all. That is why spam is such a huge problem. You cannot block those kinds of messages.

If you try and change the authentication settings then you will just stop receiving email.

A decent anti-spam tool should be able to block those messages as it is a fairly standard technique. However that will mean a third party tool or service being required - the native tools aren't really up to it.

Simon.
0
 
Nick RhodeIT DirectorCommented:
Typically the best solution is using a 3rd party spam filter (Internal or external).  Internal one would be something along the lines of a barracuda and external would be something like mailmax or postini etc.  This helps with reducing traffic to your exchange from spam as well as keeping it out.
0
 
swatujctAuthor Commented:
thanks

I already applied third party solution now. it works well. thanks
j
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.