Hi JGuevarra
I'm not sure I understand your question correctly, but the way I did this is to allow smtp outbound and inbound and prohibit relay on the exchange server (look in :http://www.exchangeadmin.com/Articles/Index.cfm?ArticleID=7696)
Spam is another issue, which is very difficult to deal with. The best resource is finding some of the companies on the internet that maintains lists of open relay's... They do however charge you for their services...
Best regards
Morten
-----Original Message-----
From: Joven Guevarra [mailto:[EMAIL PROTECTED]]
Sent: 13. november 2002 02:51
To: [EMAIL PROTECTED]
Subject: [FW-1] SMTP Security Problem
Hi to all,
I have an Exchange 5.5 Server. Then I setup my SMTP
Resource on our FW-1 to avoid spamming or relaying.
Then I encountered problems like "mailbox unavailable"
-> if i am sending from yahoo to our domain, or
"Relaying is Prohibited" -> if I am sending mails
outside.
this is my setup:
--------- - - -
exchange | | |
5.5 |-----> | FW-1 |-----> Router Gateway
10.4.2.10| - - -
---------
I used FW-1 to define a Static NAT for my Mail Server
from 10.4.2.10 it becomes a public ip.
This is my rule:
any ---> mail Server -----> SMPT Resource --> accept
outside interface
(public ip)
why is it that I am encountering these problems? How
can I make it run right?
Thank You
Your Help is very much appreciated,
JGuevarra
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