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I have a client who uses an external spam-filtering service - MX records direct the mail to the service, then they push the mail to Exchange. The SMTP virtual server is set to only accept mail from this one IP address to prevent spammers circumventing it. This all works great. Client now wants POP3/SMTP...
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It is best to deny all relaying (Select "Only the List Below") and then only add IPs that are allowed. You may also set the "Allow all computers which successfully authenticate to relay regardless of the list above" especially if you have POP/SMTP clients. If you do you will want...
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Hi jstidley , I was abroad, Yes localy we can telnet to the server.
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Mark, There is a way to do this, you would want to create a seperate SMTP connector for each IP address and then give each one a seperate address space. Most security "experts" will tell you its not a good idea to bridge two networks with a non-firewall device. Is it possible to drop down to...