Supported Versions of Internet Explorer
Campaigns built with our new version of Campaign Server (S2) will not support Internet Explorer.
Older ShortStack campaigns support Internet Explorer version 11. Previous versions of Internet Explorer are not supported by Facebook or Microsoft and therefore not supported by ShortStack.
If a Facebook user enables Secure Browsing (https) in their Account Settings, but the URLs within your campaign are not using the HTTPS protocol, Internet Explorer will display a security warning to the user.