What Causes Mail To Be Flagged As Junk?

Posted on 2009-04-30
Last Modified: 2013-12-09
How can I tell what rules/flags were tripped to cause an email message to be designated as junk and moved to my Junk E-mail folder?  I am using MS Outlook 2007.  Additionally, I have Symantec Brightmail in front of my Exchange server.  The email message has not been alter by Brightmail (subject prepended with SPAM:).  I'd like to understand the "rule" that MS Outlook executes when determining how to designate a message as SPAM.
Question by:artisit
    LVL 6

    Expert Comment

    I think most of the mail agent is about the same on this matter...

    First they will detect the host of the sender is it tally with the smtp header or something... Cos the email address can be altered easily but not the integrity of the host information. So let's say someone using a non secure mailing server to send you a mail, his domain is, but his email address is it will be classified as a spam.

    Another issue is the content and title of the message, if they have a lot of "free", "sex" or any other obscene and ads relevant words, it will be more likely to be shifted to spam...
    LVL 34

    Expert Comment

    Bulk mail / BCC (blind carbon copy) is What Causes Mail To Be Flagged As Junk.
    LVL 15

    Expert Comment


    1) check this link on which keywords that would make the message flagged as junk:

    2) See how outlook 2007 handles junk emails:

    A Symantec Certified Specialist @ your service

    Accepted Solution

    It would appear there is an issue with Outlook running in Cached Exchange Mode on a terminal services platform.  This is apparently the cause of the false positive junk message flagging.

    Featured Post

    Why You Should Analyze Threat Actor TTPs

    After years of analyzing threat actor behavior, it’s become clear that at any given time there are specific tactics, techniques, and procedures (TTPs) that are particularly prevalent. By analyzing and understanding these TTPs, you can dramatically enhance your security program.

    Join & Write a Comment

    Granting full access permission allows users to access mailboxes present in their database. By giving full access permission one can open and read the content of any mailbox but cannot send emails from that mailbox.
    Outlook Free & Paid Tools
    Get people started with the process of using Access VBA to control Outlook using automation, Microsoft Access can control other applications. An example is the ability to programmatically talk to Microsoft Outlook. Using automation, an Access applic…
    To add imagery to an HTML email signature, you have two options available to you. You can either add a logo/image by embedding it directly into the signature or hosting it externally and linking to it. The vast majority of email clients display l…

    745 members asked questions and received personalized solutions in the past 7 days.

    Join the community of 500,000 technology professionals and ask your questions.

    Join & Ask a Question

    Need Help in Real-Time?

    Connect with top rated Experts

    14 Experts available now in Live!

    Get 1:1 Help Now