-5
votes
2answers
125 views

Our exchange server is sending out a lot of spam [closed]

We have an exchange server 2003 and our IP address was blacklisted. When I check the Queue folder in the exchange server root directory, there are tons of Delivery Status Notification (Delay/Failure) ...
0
votes
0answers
31 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
56 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
1answer
213 views

Exchange Server 2010 Relaying Spam

Recently I began receiving AOL spam feedback reports from our exchange server. As I investigated I found that hundreds of spam messages were being relayed through our exchange server. Although I am ...
0
votes
1answer
77 views

Is there a system-wide way to flag a message as spam in Exchange?

Every once in a while a spam message makes it into the network. The spam message might go to one or more recipients. When sent to multiple recipients, the emails are addressed only to individuals (vs ...
1
vote
1answer
1k views

Header to redirect to Junk E-Mail folder?

For Exchange 2007/2010, is there a header I can set outside of the Exchange organization, that once that message reaches the Exchange org, it will automatically be classified as spam? The use case is ...
4
votes
1answer
294 views

Will Amazon SES improve spam filtering through typical spam filtering packages

We built web applications which create a fair amount of transactional emails, such as tickets, reminders and logging messages. These emails are typically sent to end users, but most of them are also ...
2
votes
1answer
413 views

Why would messages in Exchange 2010 R1 with 0 SCL scores end up in Junk Mail folder?

We have Hub Transport rules that mark e-mail messages with a 0 SCL score if they meet certain criteria. However, some messages that should be caught by these rules are still ending up in the Junk Mail ...
1
vote
3answers
3k views

Prevent Spammers from using my SMTP Queue in Server 2003

I am running Exchange on an installation of SBS 2003 and I have recently run into a problem where random spam queues began showing up in my SMTP queues. I was first alerted to it because my antivirus ...
2
votes
2answers
309 views

Outbound business email being marked as spam in other organizations

Wanting to make sure I've done everything I can to prevent our legitimate email from being incorrectly marked as spam by other companies: Exchange 2010 with SP1, no major changes in 6 months. I've ...
0
votes
1answer
118 views

How to view Exchange safelist

I've been able to update the Exchange safelist based on the user mailbox safelist with: get-mailbox | where {$_.RecipientType -eq ...
0
votes
1answer
94 views

Are you able to filter outgoing NDRs based on Header in Microsoft Exchange?

I administrate an email system for a commercial ISP. I'm currently having an issue with one of our customers relaying outbound SMTP traffic from their Exchange system through ours, and they're ...
0
votes
1answer
389 views

quarantine mailbox not receiving quarantined items exchange 2010 anti-spam content filtering

On exchange 2010, i have the anti-spam features installed on the hub transport. I have the content filtering enabled, with quarantine if the scl is higher than 7. this is the only option i have turned ...
1
vote
1answer
82 views

Temporary E-mail Addresses in Business

I'm a big fan of services like mailnull which allow users to give a temporary e-mail address to prevent spam. I'd like to give something like this to my users. Does anyone know of any solutions ...
0
votes
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 ...
0
votes
2answers
82 views

Blocking spam from free e-mail providers

I'm having a bit of an issue with a recent spam wave on my network. We're using a variety of e-mail checks that have been quite successful thus far, but these e-mails are presenting a problem. They ...
1
vote
4answers
156 views

Increase in Spam Effectiveness

Over the last few days, I've seen a drastic increase in the amount of blatant spam making it inside of my organization. (Exchange 2003 behind Ironmail, Symantec Mail Security.) My security products ...
4
votes
2answers
13k views

How can I track who is sending spam through an Exchange server?

I have an Exchange 2003 server that sent me an email this morning: SMTP Server Remote Queue Length Alert Looking in the queues using Exchange System Manager there were just over 16,000 spam ...
0
votes
4answers
1k views

Exchange 2007 server send out spam

Our exchange server is sending out spam, as it has been listed on various spam blacklist and not to sure know how to stop it. I've started with verify SMTP with a site like ...
1
vote
3answers
933 views

blacklisted exchange 2003

Our firewall failed about 3 weeks ago and while it was being replaced we were placed on the “cbl.abuseat.org” spam blacklist. Once we got the new firewall in and configured we were able to get ...
1
vote
1answer
1k views

Forefront 2010 Antispam vs Exchange 2010 Antispam?

They look pretty similar, do they work together or independently? For example you have content filtering in Forefront where you can specify SCL barriers, just like in Exchange. However theres no ...
0
votes
1answer
3k views

Emails are going to spam

Hey guys, I am currently running exchange 2010, I have implemented SPF record, and tried to implement dkim/domain keys using domain sink, but it doesn't seem to work. The problem I am having is that ...
1
vote
7answers
831 views

Exchange Server: Ways to defeat spam?

What are all the different ways to combat all forms of spam on Microsoft Exchange Server (2007 preferred)? Types of spam may include: Embedded image spam malicious Zip file spam Email with SenderID ...
1
vote
3answers
978 views

Backscatter Issue

Can somebody please help me with this issue. In our company we are having issues sending emails to @hotmail.com addresses. I have contacted Microsoft "Support" directly about this issue and they ...
0
votes
2answers
2k views

Exchange 2007: Move messages with SenderID fail to Junk Mail Folder?

In Exchange or Outlook 2007, is it possible to move messages with a "Fail" or "SoftFail" SenderID status to a mailbox's Junk Mail folder? I keep getting spam that fails SenderID, but has very low ...
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 ...
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 ...
1
vote
2answers
4k views

Can I enforce mail rules server-side in Exchange 2007?

I have a client who gets a TON of spam to their public IP. I have put a Linux box running exim and spamassassin in front of it, and a bunch of Outlook rules to move mail into the Junk Email folder ...
2
votes
4answers
713 views

Is OpenDNS safe to use in a location with Exchange/Reverse DNS

I like OpenDNS, but was wondering if anyone has experience deploying it for a location with an Exchange installation. I'm concerned specifically about whether any filtering they do would cause ...
0
votes
5answers
6k views

Is it possible to trace a sent outbound email back to the origin?

So here's the situation. An email was sent from a computer within our organization yesterday and we were subsequently marked as spam because of it. We don't know who sent it. We don't know when it ...
14
votes
11answers
12k views

Good & free Exchange spam filter [closed]

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