Unfortunately, rank up packages are not sent to the Postmaster. Collecting each package as you rank up is required, otherwise, previous packages from old rank ups will be overwritten by new ones. You may find more information in this help article:
https://www.bungie.net/Mobi/en/About/Article?id=13480
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So your saying i just lost all my packages? thats pretty stupid as in year one once you rank up your faction or whatever the packages are automatically transferred to your Postmaster. Why would Bungie get rid of that feature, that feature is the exact reason no one has ever had this issue. It just doesn't make sense to me why bungie would get rid of that, I was convinced i was having transfer issues with my Postmaster.