How can we add this to a selectable option so it can be used as a filter for false opens? When using queue the “immediate open” trick doesn’t work depending on the speed of your email server.
In my case all the relatively immediate opens list Mozilla/5.0 (Windows NT 5.1; rv:11.0) Gecko Firefox/11.0 (via ggpht.com GoogleImageProxy)
As browser+Os but it’s not a selectable option anywhere.