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Mail Relay in Exchange 2000

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by vigo98 1 view

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I can't seem to understand how to disable relaying on my sever while allowing people to send emails properly. I have users that travel around the globe, so I don't know what IP's they'll be coming from. All my users are using POP so I guess the option of allowing relaing to those who authenticate is not the right one either.
And when I check to allow only "the list below" I have to specify all the domains I permit sending mail to. It's kind of imposible considering that there ar eover 100,000,000 registered domain names.
I know there must be a way around this (that's why the option is there) but how do I use it?
Thanks for any advice,
Victor

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by nettek

A mail relay means that your Exchange server will accept email messages from UNKOWN senders on the Internet(i.e., they do not have accounts on your mail server) and send them to other SMTP servers. By default Exchange 2000 does not allow this. It will only accept incoming and outgoing mail for your Exchange mail domain. When you say you "have users", I am assuming they have accounts on your Exchange server.

To confirm whether or not your Exchange server is acting as a mail relay, go to System Manager, expand your organization object -> servers -> the_particular_server_in_question -> protocols -> smtp. Right-click the virtual smtp server, and select properties. It is here where the option to "allow all computers that successfully authenticate to relay" is located. DO NOT give this option. If you leave the "Only the list below" checked, but leave the list blank (this is the default), your server will not act as a mail relay, but your users can still access Exchange.

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