EWS CreateItem and "spam"

Question

0

We are creating a product that migrates a bunch of mail to Exchange. We are using EWS and CreateItem

What we find is sometimes stuff is recognized as "spam" in the user mailbox and then moved to junk mail. We don't want that!

Looking at [MS-OXSCPAM], it appears there are two approaches one could take:

 

1. PidNameExchangeJunkEmailMoveStamp

a. Look for this to be defined in PidTagAdditionalRenEntryIds, if not create it there

b. Set this per message

OR

2. PidTagContentFilterSpamConfidenceLevel

Set to 0xFFFFFFFF per message

 

Which is formally recommended by Microsoft?