You can easily manage setting up your MailGun account by following these intruction
- Login to Your MailGun account
- Create a sending domain (This should match your sub-domain for accessing your Rezosystem application)
- Copy the needed DNS settings to add to your Name Servers
- Add the DNS setting to your Name Servers
- Login to MailGun and and check your DNS setting are verified
- Copy you API Key to safe place
- Add the Sending Domain and API key to Rezosystem ADMIN panel in Email Settings
Here is a video of the entire process: click HERE.