This is a great tool for the Gmail users to manage the outgoing email responses. It comes with the following functions and specifications:

1. Send emails in campaign form.
2. Track for bounced emails, replies and out of office notifications.
3. Follow up functions (email content is default).
4. Reduce possibility of email being rejected due to invisible tracking beacon.
5. No sending or tracking limits (up to Google Quota).
6. Automatic functions in the midnight (00:00 to 07:00).