Listserv is used as the email blast system that sends the final email message to all faculty, staff, and students when an alert is ready to go out.
When the Timely Warnings system is ready to send an email, it sends the email directly to the Penn State Listserv system. The Listserv system then holds on to the email from the TW system until it is approved.
While it waits, Listserv sends a confirmation email to the administrator of the listserv. The administrator traditionally would click the approve button, however; in order to automate this process, Mailgun is used to intercept that confirmation email, convert it to JSON and send a POST request to our Timely Warnings site with the contents of the email.
You can find more documentation here on listserv at psu. http://kb.its.psu.edu/taxonomy/term/255 Please see more about Mailgun in the Wiki Navigation.