When inviting users to your Funnel Report Center the invite emails will be sent with your own email address as the sender. However several email platforms will by default add additional information to show that this email did not come directly from your email servers. This indication may show up as "on behalf of" (Microsoft) or "via funnel.io" (Gmail) or in other variations.
If you would like your invites not to have this additional information you will need to locate someone within your organization that has control over the DNS for your domain. If the correct SPF and DKIM entries are applied to the DNS for your domain this additional information will no longer be added to the outgoing emails.
Funnel uses the MailChimp / Mandrill platform to send emails. Detailed instructions on how to set up the DNS entries is available in their documentation.