Since around my Treo days, Sprint stored our incoming picture mails online, and a lot of outgoing picture mails as well but not anymore..
As of 04-30-2012 Sprint's site http://pictures.sprintpcs.com will be no more. Whether it be an emergence of MMS capable devices or lack of interest in viewing pics on Sprints photo site, the time is over. Sprint tried to revamp the site about 2yrs ago but it still lacked a lot of direct device upload, sharing etc which probably wasn't a good thing.
So um yea, if you want to grab those archived photos of your favorites you need to head over there now before its done & over with. First Sprint gets rid of Sprint Mail accounts ...now the PictureMail accounts... SMH. Sprint Photos app anybody http://pictures.sprintpcs.com