Interesting, thanks.
Why would an incoming external email (from gmail for example) get a SCL of -1?

We actually tried to use the following rule as well, but people in the contacts 
address book were also going to the junk folder:
"Apply this rule after the message arrives
On this computer only
Move it to the Junk E-Mail folder
Except if sender is in Contacts Address Book"

We then found that if we deleted the contact record (whose incoming email was 
going to junk) from the address book, and add it back, it worked properly for 
that particular contact.  But we don't want to have to delete and re-create 
hundreds of contacts.



From: [email protected] [mailto:[email protected]] On 
Behalf Of Michael B. Smith
Sent: Thursday, November 12, 2015 9:04 AM
To: [email protected]
Subject: [Exchange] RE: Outlook 2013 junk email options

SCL of -1 means that the message was generated internally and is therefore 
"defined safe".

If you want everything, absolutely everything, to go to junk, except some 
number of source addresses, you need to use a rule.

From: [email protected]<mailto:[email protected]> 
[mailto:[email protected]] On Behalf Of Mazzaccaro, David
Sent: Thursday, November 12, 2015 8:29 AM
To: [email protected]<mailto:[email protected]>
Subject: [Exchange] Outlook 2013 junk email options

Exchange 2010 and Outlook 2013
Trying to get Outlook configured to "Safe Lists Only" so that only mail from 
addresses in the safe list make it through to the inbox.
Everything else goes to Junk folder.
This is not working, nothing is going to the Junk folder.  Everything continues 
to come into the inbox.
Reading the headers of both internal and external messages, they have this:
X-MS-Exchange-Organization-SCL: -1
Is Exchange telling outlook that these messages are "ok" by tagging them with a 
"-1"?

I confirmed my Exchange mailbox is recognizing my junk mail settings with 
Get-MailboxJunkEmailConfiguration:

RunspaceId               : xxxxxxxxxxxxxxxxxxxxxx
Enabled                  : True
TrustedListsOnly         : True
ContactsTrusted          : False
TrustedSendersAndDomains : {[email protected]}<mailto:%[email protected]%7d>
BlockedSendersAndDomains : {}
MailboxOwnerId           : <<< Details removed >>>
Identity                 : <<< Details removed >>>
IsValid                  : True

How can I get Outlook Junk email options to use "safe lists only"?

Thanks in advance.


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