In vBGallery works perfect email notifications.
In Photopost Pro testing i have integration with vbulletin 4.1.3: in admin options i have enabled email notifications.
remember pro uses a simple php mail statement you can not compare to vbgallery which uses the vbulletin mail setup. If your server supports php mail and is functioning properly then you will get mail in pro. there are several switches in pro admin options
Use email to notify users?
Allow users to be notified of new posts via email?