• RSS
  • Twitter
  • FaceBook

Exchange Server Forums

Forums | Register | Login | My Profile | Inbox | RSS RSS icon | My Subscription | My Forums | Address Book | Member List | Search | FAQ | Ticket List | Log Out

Server being used for spam?

Users viewing this topic: none

Logged in as: Guest
  Printable Version
All Forums >> [Microsoft Exchange 2000] >> Server Security >> Server being used for spam? Page: [1]
Login
Message << Older Topic   Newer Topic >>
Server being used for spam? - 13.Jun.2003 2:44:00 AM   
Hellbore

 

Posts: 6
Joined: 13.Jun.2003
From: Arizona
Status: offline
Lately our Exchange server has been being hit by LOTS of spammers. It's an Exchange 2000 version 6 server with the latest updates... This is how they are getting around the security:

Say our email domain is ourdomain.com and the person they are trying to spam is victim@isp.com

They send a message like this:

mail from: whoever@whatever.com
rcpt to: <victim%isp.com@ourdomain.com>

Our stupid server thinks the email is supposed to be for ourdomain.com but SOMEHOW it actually gets delivered to victim@isp.com ! The % gets turned into a @ or something.

Anyone know how I can stop this from happening? It seems to be a common exploit, because my friend who is running the latest version of Post.Office (a different email server) has the SAME vulnerability on his machine!
Post #: 1
RE: Server being used for spam? - 2.Jul.2003 5:44:00 PM   
brianfrazer

 

Posts: 11
Joined: 2.Jul.2003
From: Washington-West Coast
Status: offline
Sounds like you need to set your relay option to not allow relaying. If you have users that need to send from home through your server then you can allow authenticated users to relay, but you will need to set the security on their off-site machines or they will be denied as well.

Hope this helps..........Brian

(in reply to Hellbore)
Post #: 2

Page:   [1] << Older Topic    Newer Topic >>
All Forums >> [Microsoft Exchange 2000] >> Server Security >> Server being used for spam? Page: [1]
Jump to:

New Messages No New Messages
Hot Topic w/ New Messages Hot Topic w/o New Messages
Locked w/ New Messages Locked w/o New Messages
 Post New Thread
 Reply to Message
 Post New Poll
 Submit Vote
 Delete My Own Post
 Delete My Own Thread
 Rate Posts


Follow TechGenix on Twitter