I am using civicrm 4.7.7 on Drupal 7. How can I create a report of all mailings sent with CiviMail reporting the data of contacts that opened/clicked/replied the mailing? Thanks in advance
This extension should do it ...
You can see these data in the mailing report: https://book.civicrm.org/user/current/email/reports-and-analysis/ for each mailing.
I don't know of a report that would aggregate all of these stats.