Hi @Anonymous,
Do you want to pass email address from your PowerApps app to your flow (Microsoft Flow)?
Could you please show a bit more about your PowerApps app's configuration?
If you want to pass email address from your PowerApps app to your flow, I think the PowerApps button trigger could achieve your needs. More details about passing parameters from PowerApps app to Microsoft Flow, please check the following article:
Start a flow in an app
I have made a test on my side, please take a try with the following workaround:
The To field set to Ask in PowerApps dynamic content of the trigger.
My PowerApp app's configuration as below:
The OnSelect property of the Button control set to following formula:
'20180528_case6'.Run(DataCardValue4.Text)
Note: The '20180528_case6' represents the SharePoint list data source within my PowerApps app, the 'DataCardValue4' represents the control which stores the email address.
The flow works successfully as below:
Best regards,
Kris