Sendmail - only accept mail from authenticated users and gateway
I've recently setup a dedicated system as an email gateway for all incoming mail. It checks mail for spam and viruses and forwards it on to the correct server afterwards.
What I want to do on the other mail servers is configure sendmail to only accept mail from authenticated users and the mail gateway address. I don't want the servers to accept mail from anywhere else.
I've googled a bit and can't seem to find docs for sendmail to accomplish this. Maybe I'm not search the correct phrase? Any help will be appreciated!
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