I have a postfix server that receives mail (authenticated) from several sources (scan-to-mail, apps and more) and based on sender address...
I've ran into an unexpected problem relaying emails sent to a domain to another host. In ISPConfig I've added the mail domain and set a relayhost...
I have a multi-server setup with separate spamfiltering (eFa) for in- and outbound mailtraffic. This works like a charm using relayhost and native...
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