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Do a message tracking see where it hangs up
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Outlook can remove attachments that are sent and received. If it is one user that cannot receive the attachments but others do then you need to check the settings on the client that is having problems.<br />
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Check the following for more details and instructions:<br />
<a href="http://support.microsoft.com/kb/837388" rel="ugc nofollow">http://support.microsoft.com/kb/837388</a><br />
<a href="http://office.microsoft.com/en-us/orkXP/HA011364471033.aspx" rel="ugc nofollow">http://office.microsoft.com/en-us/orkXP/HA011364471033.aspx</a>
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Do you have filters implemented?<br />

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Does it block attachments from same senders or is the issue intermittent?<br />
Check for inbound message rule. There might be something configured to delete emails containing attachments from particular senders.<br />
Check if there's a rule implemented on your Outlook which is deleting attachments with specific extension.
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I have a spam filter. It blocks attachments from the same three senders. The senders don't receive any error or bounce back message. On their end, it seems that the message goes through just fine. Should I check the inbound message rule on the server or the client.
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My user can't receive e-mail attachments from certain users on the same Exchange Server. &nbsp;He can receive the message but the attachment is gone.
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My user can't receive e-mail attachments from certain users on the same Exchange Server.  He can receive the message but the attachment is gone.

Do a message tracking see where it hangs up

Outlook can remove attachments that are sent and received. If it is one user that cannot receive the attachments but others do then you need to check the settings on the client that is having problems.

Check the following for more details and instructions:
http://support.microsoft.com/kb/837388
http://office.microsoft.com/en-us/orkXP/HA011364471033.aspx

Does it block attachments from same senders or is the issue intermittent?
Check for inbound message rule. There might be something configured to delete emails containing attachments from particular senders.
Check if there&amp;#39;s a rule implemented on your Outlook which is deleting attachments with specific extension.

I have a spam filter. It blocks attachments from the same three senders. The senders don&amp;#39;t receive any error or bounce back message. On their end, it seems that the message goes through just fine. Should I check the inbound message rule on the server or the client.

My user can&amp;#39;t receive e-mail attachments from certain users on the same Exchange Server.

My user can&amp;#39;t receive e-mail attachments from certain users on the same Exchange Server.  He can receive the message but the attachment is gone.

My user can't receive e-mail attachments from certain users on the same Exchange Server.

Interactions between email servers and clients are governed by email protocols. The three most common email protocols are POP, IMAP and MAPI. Most email software operates under one of these (and many products support more than one).  The correct protocol must be selected, and correctly configured, if you want your email account to work.

Email Protocols

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.