Hello,

• Go to Settings[General Settings]-> Under Discuss section enable  Use Custom Email Servers.
• And navigate to ->Outgoing Email Servers which ​enable after checkin the Use Custom Email Servers.

And Fill the form,

• Enter the email in Form Filtering and Username ,
• And Enter the Password which is App password in the google. Click Here
• And then Click Test Connection Button to connect.

Same Setup is follwed for Incoming Email Server.

​Check and clarify your doubts.