All of the emails that are sent to the organizations in your Data Collector through Worldfavor are logged in your Email history.
You can access the email history under Automation in the top menu bar:
Filtering among sent emails
If you are sending many emails through Worldfavor, it can be helpful to filter your email history to get a better overview of the emails you have sent.
Filter by organization to only view the e-mails you have sent to specific organizations
Filter by purpose to see the emails sent as Invitations versus Reminders
Filter by status to see what emails was Sent and Failed to send
Filter by date to only view emails sent within a chosen timeframe