Great to know you're able to log in and enjoy this great tool.
There are two parts during installation that you're asked to provide email and password.
the first part is the mailer setting part, with mailer you can recover forgotten password from the web login interface.
you were asked to provide:
- SMTP service
- SMTP username
- SMTP password
- sender email address
These has got nothing to do with your admin account and password.
the second part where you're prompted to provide:
Email address (that's your login email or admin account)
Password (that's your admin password)