Mark Constable writes:
The point I was making about the postfix configuration is that it works when the SPF/TXT record for the domain only includes the IP of the domain on the virtual interface without having to include the default eth0 IP as well. This is the "magic" I was hoping courier could also emulate. Ie;...206.221.219.125- unix - n n - - smtp -o smtp_bind_address=206.221.219.125 So is the bottom line there is no way for courier to provide a binding to the virtual interface so that it would pass SPF checks without having to add the default eth0 IP of 206.221.219.122 to the SPF record for eth-os.org?
If you're looking to have /all/ outgoing mail sent from a socket that's bound to that IP address, this would be the SOURCE_ADDRESS (or SOURCE_ADDRESS_IPV6) setting in the courierd configuration file.
I'm not familiar with Postfix config setting, but I didn't see anything there that's domain specific, so I'm assuming that all it does is set the IP address for outgoing sockets, for all mail. That's the SOURCE_ADDRESS setting.
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