With cloud-based SMTP services from Mailgun, you can send emails through FP2 without needing to support your own email server. This has created a more reliable way of sending emails.
1) Under the Set Up tab select Custom Settings.
2) From the Custom Settings window select the Other tab.
From there select the Email tab.
Under the email tab you will see the option to switch on the MailGun SMTP by selecting “Use Mailgun SMTP”.