0
votes
0answers
50 views

How to prevent spam from authenticated users on the internet to be sent out from Exchange 2003?

From time to time, a 2003 server starts dumping huge amounts of email to the internet. When this happens, I stop the service and clear all the spam and put it back online, however, the damage is ...
0
votes
1answer
61 views

Spamming from Exchange 2003

I am apparently spamming the world (about 1000 a day) but cannot figure out how. Mxtoolbox does not list me as an open relay and I have disabled all relays that I can find. I have run every virus ...
2
votes
0answers
178 views

How to identify the user/computer that is relaying spam through a mail server?

For the past couple of days, at certain intervals, a huge load of email is dumped on my Exchange 2003 server and relayed out until it gets blacklisted everywhere. Nothing like this happened for many ...
4
votes
3answers
121 views

Spam received to mystery “users” email group

This morning, our entire company received a spam message sent to users@ourdomain.on.ca, where ourdomain.on.ca is our actual domain. There is a distinguished name that this could correspond to: ...
4
votes
2answers
1k views

Barracuda tagging email with 'date grossly in the future.'

I have a Barracuda 300. Granted it's running on some old firmware and the Energize updates are quite outdated. I'd like to update them, but, not my financial decision to do so. Starting around the ...
1
vote
3answers
2k views

spam problem related to reverse dns config

I have a client whose ISP recently switched their circuit and static IP to an IP that was already blacklisted for SPAM (nice). The client is running Windows SBS 2003 with Exchange 2003 and DNS for ...
1
vote
2answers
857 views

Spam relaying through my mail server?

Would anyone mind having a quick look at the header below to help me identify if our mail server is acting as a relay for spam (or something else)? It was received by an RBL a few days ago, and its ...
0
votes
2answers
285 views

My exchange 2003 mail server is blocked by RBL lists. Someone is sending spam from inform@mydomain.com

All outgoing email to external recipients from my Exchange 2003 server is getting blocked by RBL lists. I'm new to administrating Exchange and i checked the Message Tracking Center under System ...
1
vote
1answer
4k views

Exchange 2003 mail non-delivery (NDR), spam activity? events 7002 & 7004

Windows Server 2003 Small Business Server SP2 Exchange Version 6.5 (Build 7638.2: Service Pack 2) This network has been neglected and has been having email problems for years and was on many ...
1
vote
4answers
181 views

Spam just keeps on coming

I administer a Windows Server 2003 with Exchange 2003 as well as GFI installed. I am watching the GFI dashboard and every third email is spam. Not only that it goes to a non existent address then the ...
2
votes
1answer
337 views

Exchange 2003 Spamhaus Settings

I have exchange 2003 installed on Windows Server 2003, and I have a Fedora Core 9 machine with nagios installed. I use nagios to send emails about server issues which has been working fine for years ...
0
votes
1answer
373 views

ISA Server and Exchange - Port 25 Issues

What is a best practice method for minimising spam issues when spammers are getting through our ISA 2004 gateway and spamming from our exchange server? Is there a fantastic document that someone ...
2
votes
3answers
8k views

Outlook - Junk Email - Add an email to the safe senders for entire company?

We've got an internal web based system that emails out reports on a regular basis. The emails are sent as: internalsystem@thecompanyIworkfor.com and the body of the email has a bunch of data and some ...
5
votes
6answers
30k views

How do you detect a spambot on your network?

I help manage a small network of about 40 computers. We are running an Exchange 2003 mail server. What is the best way to find which machine is infected by a spambot? I've tried installing anti-virus ...
6
votes
12answers
1k views

Recommendations for handling Directory Harvesting spam on Exchange 2003

Our Exchange server is getting slammed with anywhere between 450,000 and 700,000 spam messages per day. We receive about 1700 legitimate messages in the same time frame. Roughly 75% of the spam is ...
14
votes
11answers
13k views

Good & free Exchange spam filter [closed]

Do you know a good (and free, if possible) Microsoft Exchange 2003 spam filter?