Check your email conversation between you and your customer from Agile.
Integrate Agile CRM with your Google account in seconds.
View all your email conversations in Agile's unique timeline chronologically.
Go to 'Email' tab or 'Google Apps' tab under the user Preferences menu to access Google Mail/Apps access settings.
Click on the 'Access' link and authorize access to the Google Apps/Mail account you want to be linked with Agile for 2-way google mail sync.
Check the Google Mail Sync setup guide for more detailed instructions.