Exchange 2007 - How to prevent mail from an internal user from being marked as SPAM

We have one user who sends email to all staff. This email is ending up marked as Spam . It should not be .
How do I prevent this ?
Andre PAsked:
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Adam BrownSr Solutions ArchitectCommented:
https://technet.microsoft.com/en-us/library/bb124696(v=exchg.80).aspx has some information on the Exchange Anti-Spam agents in Exchange. If can't find the Anti-spam agents in the Management Console, then the messages are being routed through a spam filter, which you would need to modify to allow messages from that user.

If you can see the anti-spam agents in Exchange, modify the sender filter to allow the user and it will keep messages from them getting flagged.
Clark KentSoftware Engineer cum BloggerCommented:
Hello

If you do-not want your sender to be marked as spam then simply
Go to inbox >> right click on the mail >> Junk E-mail >> Never block sender's domain.
Or
Go to inbox >> right click on the mail >> Junk E-mail >>Junk E-mail options >> Safe senders >> Add the domain.

Thanks & Regards
Clark Kent
suriyaehnopCommented:
Could you post the internet header of that email? Internal mail shall have scl=-1

If the internal mail consider as junk, the scl must 9 then we have to why that happen?

The sender configured his outlook as pop or imap or mapi (https for exchange 2013). What antivirus/antispam software that used or install on exchange server
Andre PAuthor Commented:
There is no antivirus on the server . There is a spam filtering service .


here is the lower half of the header


.Subject: *** SPAM ***Tand L
Thread-Index: AdHs23yyGkysBSHgQKqPk+JGYLMApQ==
Message-ID: <8F0079D5061B394E92D538EA7F9438>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-Exchange-Organization-SCL: -1
X-MS-TNEF-Correlator: <8F0079D5061B394E92D538EA7F94389A010880557>
MIME-Version: 1.0
X-Avast-Antispam: spam, score=98
X-Original-Content-Type: application/ms-tnef
X-Auto-Response-Suppress: DR, OOF, AutoReply
Adam BrownSr Solutions ArchitectCommented:
You have Avast Anti-spam installed on the Exchange server. It's scoring the user with a 98, which means "HOLY CRAP THIS IS SPAM!" to Avast. Get into the Avast Anti-spam interface and whitelist the user.

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