Send mails to the past! Muahahaha!
Compose emails that, when opened via Gmail's page with this extension installed, will have it's date altered to 7 days prior to it's delivery time.
1. You must have a gmail account in order to send the email;
2. The inbox must be viewed through a desktop browser with the extension installed on it.
Supports both English and Brazilian-Portuguese languages and uses gmail's api for sending emails and datejs library for calculating the date.