Can I get proper doucment to understand the deploy the Differential please hellp me

I am already using diffusion with external git i wish to use Differential . I need the documnet for Differential. Can some one update the the flow of *Differential to git for understanding the cycle

Hi I am using postfix to send the email using "PhabricatorMailImplementationPHPMailerLiteAdapter"
its sending mails via postfix we can see the sent maillogs in posfix maillog.
When we tried with default settings we are able to see the commiter name in outlook and outlook web access , but the problem is some time mails got bounced or blocked because of Microsoft (we are using office 365)blocking the email.
We tried with changing the metamta.can-send-as-user to true mail are blocked and error is