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I think those are the main things. But I don't think any list is as important or useful as migration testing. Set up a staging environment with your new web and database servers, migrate the application, and test it. When it passes your tests, you can have some confidence that it's ready for production. And you can do load testing in the new environment ...


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Make your old server a mx backup of the new one. For this you will need to have both servers as MX for your domain, but the old must have a bigger number as priority: example.com. IN MX 10 2.2.2.2 example.com. IN MX 20 1.1.1.1 Then you can add your domain into relay_domains: relay_domains = $mydestination, example.com Important to ...



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