Keith Willis writes:
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Greetings!
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Does anyone have any idea how to setup SMTP authentication on a per hosted domain basis?
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For example, I want certain domains to require SMTP authentication while others do not. Is there a way to do this in courier??
There is no telepathic way for a server to determine with 100% certainty what âdomainâ the connecting client belongs to. On the Internet, nobody knows that you're a dog. Anyone can try connecting to any server, and pretend to be anyone else.
Thus, taking it for granted that something like this could be done, all that someone has to do is to pretend that he belongs to one of the special domains that do not require authentication, and that's it.
Authenticated SMTP is used only for granting mail relaying privileges. In this context, the actual domain is irrelevant. Either the connecting IP address is defined in your smtpaccess file as one that has relaying privileges, or the connecting client must provide a valid userid and password, in order to receive relaying privileges.
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