Hi Marco, 

We recently blocked a sign-in attempt to your Google Account [maparillo@gmail.com]. 

Sign in attempt details
Date & Time: Saturday, May 16, 1:41 PM EDT 
Location: Pennsylvania, USA 

If this wasn't you
Please review your Account Activity page at https://security.google.com/settings/security/activity to see if anything looks suspicious. Whoever tried to sign in to your account knows your password; we recommend that you change it right away. 

If this was you
You can switch to an app made by Google such as Gmail to access your account (recommended) or change your settings at https://www.google.com/settings/security/lesssecureapps so that your account is no longer protected by modern security standards. 

To learn more, see https://support.google.com/accounts/answer/6010255. 

Sincerely,
The Google Accounts team