Hey there davnew11,
Welcome to Apple Support Communities.
From what I gather, the Mail application's windows aren't automatically re-opening on your MacBook Pro. If you haven't already, take a look at the article linked below and make sure "Close windows when quitting an application" isn't selected in System Preferences.
Automatically re-open windows, apps, and documents on your Mac - Apple Support
When you open an app, it automatically re-opens the windows you were working with the last time you quit the app. If you don't want apps to automatically re-open documents and windows, select "Close windows when quitting an application" (OS X Mountain Lion v10.8 and later) or deselect "Restore windows when quitting and re-opening apps" (OS X Lion v10.6) from the General pane of System Preferences.
If an app continues to re-open its documents and windows when this feature is turned off, check the app's preferences for a similar feature. Some apps have their own setting for restoring windows.
To temporarily prevent an app from re-opening its documents and windows, hold the Shift key while you open the app.
Take care.