Outlook 2010 spam filter - seems to be random

Got two users with identical setup it seems. Both using outlook 2010.
They scan to a MFD which then sends an email of the scan.

One user it goes to inbox, the other it goes to junk folder.
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KimputerConnect With a Mentor Commented:
That's designed behaviour (from Outlook). Online mode doesn't use Junk Email folder. Cached mode does.
You know this to be correct, since you didn't mention which PC did have the messages in the Junk Email folder. I now told you which one (the Cached mode) one has the spam problem.
The default Outlook spam filter is quite unpredicable yes.
Differences could be that one has not been fully updated (office updates are done along with the Windows updates monthly?).
Another could be that one user already put the MFD in the whitelist (which is the step to follow for the other user right now, since Outlook doesn't allow you to do anything more than that.)
Do both users have the same relay permissions?

Check in the SMTP virtual server in exchange and then relay permissions and you can list specific users that can relay. Are you sure authentication is not being used?
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JohnBusiness Consultant (Owner)Commented:
The rules are probably not truly identical. I would just adjust the spam rule for the machine accepting the email.

It is much better, if you can do it, to have a spam filter that is separate from Outlook. I do this.
Wayne HerbertConnect With a Mentor IT SpecialistCommented:
It is much better, if you can do it, to have a spam filter that is separate from Outlook. I do this.

+1 on that sentiment.  And from my view, better to have a third party filtering service at the server level as opposed to a locally installed, per PC, spam filter.
paulfoelAuthor Commented:
Ah Seems one user is using cached mode the other online mode.
JohnConnect With a Mentor Business Consultant (Owner)Commented:
That would change where spam was received on one, not the other, but that will not change overall incoming spam.
paulfoelAuthor Commented:
but like I said its email from a MFD device - user scans to email.
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