I have a friend who would like me to set up Coppermine for him so that (a) the sender of an eCard will get notification by email when the recipient of their eCard views the eCard on the site (i.e., clicks the link in the eCard and visits the site) or (b) the sender of the eCard will get notification by email if the recipient hasn't viewed the eCard on the site after x number of days. Does Coppermine provide either of these features? Or, if not, has anyone developed a mod for these features?
Not to my knowledge, but should be possible.
I would imagine the easiest way would be to force Coppermine to construct the link in the ecard with a unique ID for that eCard instance. I haven't worked with Coppermine before, though, so I don't know how easy this would be. That id would have to be linked in the db to the sender so it could perform the proper lookup when the ecard was viewed.