It's a system-generated email from Photobox:
"Hi,
Have a look at my album I have shared with you on PhotoBox."
Leaving aside the thorny issue of whether one can have "shared" something with someone unilaterally, and whether you can share something "on" something intangible rather than, say, a lawn or a table, shouldn't it read:
"Have a look at the album I have shared with you on Photobox."