I love the "Require Auth Match" feature, but I need to disable it for one account (or domain). So, I want that user to authenticate, but to be able to send any e-mail using that account. (I need that for handling web2mail forms.)
Is there a way I can do that? I've tried to whitelist the server, but it doesn't work.
The story behind this is - I want all e-mails that are being sent via one account to be sent via certain outgoing IP address. All other e-mails should use another IP address. I can accomplish that by creating a domain, bind it to outgoing IP address, use an account from that domain to authenticate with - just cannot bypass that "require auth match" feature.