Hi Li Dong
You need to use this Microflwo "ACT_EmailAccount_LaunchEmailConnectorOverview" to open the configuration page
for more details please check the Mendix documentation in the Link below
The answer Osama gave should be sufficient. However, if you want to add the snippet EmailConnector_Overview directly into your page, you need to wrap it into a data view. In this dataview you should make sure the EmailAccount object is returned. For this you can add a microflow which mimmicks the workings of ACT_EmailAccount_LaunchEmailConnectorOverview.
I followed the email setup steps and got the error as above picture, what shall I do, please help.
Thank you.
Best regards
Li Dong