Nginx as mail proxy: different domains with different certs

PGNet Dev at
Sun Oct 2 12:02:52 UTC 2022

> Name-based (including SNI-based) virtual servers are not supported
> in the mail proxy module.  As such, the remaining options are:
> - Use multiple names in a certificate
> - Use IP-based (or port-based) virtual servers
> You can combine both options as appropriate.

add'l useful option for mail proxy + sni

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