Exchange server 2007 sends mail that I don't want

I have an exchange server 2007  on server 2008. Recently my IP is recorded as spam but I don't send any mail except from one user. I see many mail waiting on the que. How should I setup my exchange server so that only one user can send a mail. What other thirth party softaware should I use for preventing spam gangs not to use my serever. Plase help, urgent. I cannot send any mail.
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

You can install antispam agent On Hub or Edge Server

HASANDIZAuthor Commented:
I already done that. My queueis emty for couple of days but I still see some mails trying to go out :( What else should I do?
What kind of mails are they .... who is the receipient can see the receipient using queue viewer.
Exchanage management console > org config > hub > antispam > content fltering properties > what is the current SCL rating.?. and whaht is the action
Redue the SCL rating to tighten the spam security.and enable receipient filtering.
Ultimate Tool Kit for Technology Solution Provider

Broken down into practical pointers and step-by-step instructions, the IT Service Excellence Tool Kit delivers expert advice for technology solution providers. Get your free copy now.

HASANDIZAuthor Commented:
This what I get from queue

Identity: www\14021\346563
Subject: Teslim Edilmedi: Visitor postmaster's personal 80% OFF
Internet Message ID: <2ec8934f-0659-4227-840a-cd21011690a5>
From Address: <>
Status: Ready
Size (KB): 8
Message Source Name: DSN
Source IP:
SCL: -1
Date Received: 09.01.2010 18:15:22
Expiration Time: 11.01.2010 18:15:22
Last Error:
Queue ID: www\14021
It looks like a Spam as sender is blank... you can delete these mails and create trasport rule so that the mail from blank sender is filtered or deleted.
HASANDIZAuthor Commented:
how can I do to delete mail from blank sender. I am new for the exchange.
On Hub transport server after you have installed Antispam agent go to
Exchange management console >organization configuration > hub transport > anti-spam > sender filtering > open the properties  > Blocked senders > in the bottom there is check box > Block Messages from blank senders and apply the rule restart Microsoft Exchange Transport service.
Brian BEE Topic Advisor, Independant Technology ProfessionalCommented:
In addition, please post details about why you can't send mail. If you are on a blacklist, you may have to contact the owners of that list to get yourself removed.

You can look up the IP address of you email server here:

If you aren't comfortable with that, please post your IP address and we'll check it out for you.
Brian BEE Topic Advisor, Independant Technology ProfessionalCommented:
The asker may have needed to prevent his server from sending spam, but still nobody would accept his email until he got himself off whatever blacklist he was on, so I feel that http://a26566295 is the most correct.
HASANDIZAuthor Commented:
They have removed me from the spam list. Now my mails stays in que and says delayed. we have changed our open relay to closed relay. I can recieve but I cannot send mails. after several try it returnes back to me. We were in the The Spamhaus list but they took us out.What am I missing? Plese help.

I have also checked for the black list ling above and it says I am listed on BARRACUDA and UCEPROTECTL3. What should I do to remove myself from those list?
Brian BEE Topic Advisor, Independant Technology ProfessionalCommented:
Barracuda maintains their own list

As for uceprotect, there are instructions here on how to get removed:

I have found in my own expereience that its a pain and some of the RBL lists are quite arrogant, but just make sure you follow their instructions.

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.

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.