What is my Blackberry device not receiving ALL email sent from the Exchange Server?

I am running Active Directory and Exchange Server 2000.

In Active Directory, there are two entries:  
User: Jim, email address: Jim@mydomain.com
Contact: Jim BB, email address: JimBB@vzw.blackberry.net

In Active Directory, the Exchange entries for Jim@mydomain.com is
Exchange General \ Delivery Options \ Forwarding Address \ Forward to JimBB
Deliver messages to both forwarding address and mailbox is checked.
 
The setup is simple:
When an e-mail arrives for Jim, forward it to JimBB.

With message tracking enabled in Exchange System Manager,
The log indicates 20 messages sent to JimBB.
However, the Blackberry device only receives 5 of the 20 e-mails.

Here's the predicament:  The 15 missing messages are actually SPAM, the 5 received by the Blackberry device are from legitimate clients.  How does Blackberry know what message is SPAM, and what message is "real" (for lack of a better term)??

Note:  My Inbox in Outlook receives all 20 e-mails.

Thanks for your help in advance.

Jim
jimdormanAsked:
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jimdormanAuthor Commented:
The title of the question should be "Why" is my Blackberry device not receiving ALL email sent from the Exchange Server?
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techhealthCommented:
Many are looking for a solution that would block spam from showing up on BB.  Looks like you already have one.  :)

Anyway, do you have any filtering set up in your BlackBerry Desktop Manager, or your BlackBerry Web Client site (https://webclient.blackberry.net/WebMail/Window.jsp?site=vzw)?
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jimdormanAuthor Commented:
The Blackberry desktop manager is not used.
I do have two filters set up on Blackberry Web Client:

1) If the word "general" appears in the "from" or "to" line, do not forward to the device.
2) If the word "erisa" appears in the "from", "to" or "subject line", do not forward to the device.

Note:  I had removed all filters to see if that was the problem.  However, it did not solve the problem.  The Blackberry device did not receive the e-mail.  Could it be that the Blackberry server has a "blacklist" or something that checks for SPAM?  I called verizon, but they could not give me an answer.
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techhealthCommented:
I don't think BB Web Client has any "blacklist".  My Verizon BBs had SPAM coming right in if without any filtering      set up.  They wouldn't be that nice to include the SPAM filtering for free.  :-)
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techhealthCommented:
Is there anything filtering outgoing traffic from your Exchange?
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jimdormanAuthor Commented:
I will try a test again by removing the filters.
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jimdormanAuthor Commented:
The filters have been removed.  I'll wait about an hour to see the results of the test.
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jimdormanAuthor Commented:
Inbound messages are scanned with Symantec Antivirus.
Outbound messages are not scanned.
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jimdormanAuthor Commented:
With no filtering, 19 messages went to the Outlook Inbox.
13 of the 19 went to the Blackberry device.  
6 e-mails which, according to the subject line, are spam, did not go to the Blackberry device.
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techhealthCommented:
Can't think of anything else man...  Is your Outlook always open?
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techhealthCommented:
Maybe you're right about the filtering service.  Here's an excerpt from Rogers website:

BlackBerry Internet Services features basic anti-SPAM filtering to help reduce, but not eliminate unwanted junk email for the optional @rogers.blackberry.net email account. BlackBerry Internet Service will not filter any SPAM email from your integrated POP3/IMAP email accounts such as Rogers Yahoo!, Yahoo! Mail, Google gmail, MSN, and Hotmail. You will need to configure your anti-SPAM settings for these services. For details about anti-spam features on these and other email services, please contact your Internet Service Provider. They may be able to assist you in configuring your email accounts to reduce unwanted SPAM email which will not be delivered to your BlackBerry.

So the same may hold true with @vzw.blackberry.net.  They're just doing this quietly without any advertisement, probably because it's so "basic" that they don't want to raise your hope and generate too many support calls.
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jimdormanAuthor Commented:
techhealth:

You are correct.  I spoke with Verizon Blackberry Tech Support and they confirmed that Blackberry Internet Services at RIM (Research in Motion) does filter spam.

This morning, 20 e-mails went to my Outlook Inbox.  4 of the 20 were indeed spam.  The Exchange Server's tracking log indicates all 20 were sent to my Verizon Blackberry e-mail address.  However, only 16 arrived at my Blackberry device.  So RIM is filtering spam.

Thanks for your help.

Jim
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