Use Zapier to create automatic emails, when a Podio webform is submitted. I recommend using gmail as the mailserver in Zapier, it works better than Zapiers own. You can also integrate your Mailchimp account with Podio using Zapier, and then use the automation tool build in Mailchimp. But that is not good if you want the system to send more than one automail to the same email address. But that depends on purpose of the webform.