By default, your Duplie account will send all emails from info@duplie.com. The name on the email in the recipient's inbox will be your organization's name.  You can configure your own email server by logging in as an admin and going to: Site then Settings and then clicking on the Email tab. You will need to enter your SMTP server, credentials and port. Then all outbound emails will be sent from that email address. We have a lot of clients that use zoho.com for the email provider. The best part is you can start with 10 (or so) free accounts.

The downside: When using your own email account, we do not track email Open/Clicks.  Also some mail providers (gmail, outlook) do throttle emails being sent from remote sources as this is a commonly used method for spamming.