Yes, you can use your own email address!
ORGs running on Propertybase Package Version's higher than 3.17.34 (1.333) -> how to identify your version, can send multiple emails at once.
You´ll need to have access to your domain server (most probably your IT Administrator has this), as we are needing you to set three CNAME entries:
Please send us the domain you want to send from so we can send you your CNAME values.
Depending of your ORG configuration you might use native Salesforce emails, too. Please read here how to enable your domain for those emails as well.