In this case you should open just copied MailRock in your browser.
At first time application ask you configure security options, see in picture →.
This is important step to protect your system. Enter desired login, password (don't forget to confirm your password).
When security step was pass, MailRock mailer ask you to review and save system defaults.
— Sender Name
Your company or full name, recipients should see from who they're got letter.
— Sender Email
Your company or personal email.
— Email for Reports
This email known only you. Application will automatically send report about delivery on this address.
* Don't forget to configure cron (scheduler) on your server. Read more →