I have a mail server that my internal clients use as well as I use while away from home. I want to relay mail from everyone to me@mydomain.com to my internal mailserver without requiring authentication. However, so I don't have an open relay, I want to require authentication to forward mails that are to other domains (not mydomain.com). The manual does not say whether or not I can require SMTP AUTH only for non-home domains. If not, does it forward the senders SMTP Auth info to my internal Server so it can do the authentication for relaying. The SMTP proxy will only be used to relay incoming mail. The internal server will send directly to the internet via port 25.
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