I have a question on how to make Kerio work in the below config (if it is even possible).
We have a scenario where some domains are using Postini so we want to only allow inbound port 25 from Postini servers and/or SMTP authenticated users only. We want to keep port 25 open so the end users do not have to switch to one of the alternate SMTP ports. However, we have to stop direct connections that bypass Postini.
We have this working great with postfix and we can even allow certain domains to receive direct connections that coexist on the same server that doesn't allow direct connections (unless from Postini IP addresses or SMTP authenticated users).
If anyone knows how to configure Kerio to work in this fashion let me know.
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