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Thread ID: 12680	2001-11-06 05:46:00	Exchange 5.0 being used to relay - HELP!	Guest (0)	Press F1

Post ID	Timestamp	Content	User
23751	2001-11-06 05:46:00	Our school's Exchange 5.0 server has been highjacked and we have sent around 50000 spam e-mails across the the Net. How do we stop this happening? (We've shut the server down in the meantime.) I can't find any settings in Exchange Administrator that prevent relaying. People are getting rather (understandably) annoyed with us...	Guest (0)
23752	2001-11-06 06:58:00	hi Perry I hope you didn't install the server... When you close the open relay you will only be able to use MAPI and IMAP clients to read and send mail. Here is a link to instructions on closing the open relay: www.sans.org Good luck!!	Guest (0)
23753	2001-11-06 07:04:00	hi Perry, further to my other post, perhaps you should have a look at the bigger picture... Is your exchange server hanging directly out on the internet? Or are you behind a NAT or firewall device with a pinhole on port 25? If you have your exchange server with it's tail hanging out, are you running port restrictions on the external interface? If you are behind a firewall and it acts as a relay then it's likly to be at fault here...	Guest (0)
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