Barry Brimer wrote: > > I have a mail server that handles several domains. One of these domains has > decided to use Postini. For those not familiar with Postini, you set your MX > records to use their mail servers. They filter mail, and deliver you only the > clean virus/spam free mail. The idea is to only allow incoming mail from their > mail servers so spammers are unable to send to your mail server directly. This > is fairly simple to do with standard restriction classes for a dedicated mail > server. I am not sure how to accomplish this on a shared mail server. Ideally > I would like to instruct postfix to accept mail from anywhere for all domains > except one domain (the one using Postini) and only allow mail destined for that > specific domain to originate from Postini's mail servers. Any ideas would be > greatly appreciated. check_recipient_access key value postini-domain postini-domain-restrictions smtpd-restrictions postini-domain-restrictions postini-domain-restrictons check_client_access key value postini-ips/rdns OK check_client_access key value anything(regex/pcre) REJECT