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Blank Emails coming from outside our network

Over the past week, we have had an increase of blank emails being delivered to two recipients within our network.

The email send only has this in the From box

From: "" <>

Ive checked the tag info and its not showing who its from and there is no txt in the body of the email.

how would I go about tracing the source or simply just stopping the message from getting into the mailboxes?

The email system is Exchange 2003 and our spam filter are Google App Security.

1 Solution
Use rules to deny blank sender.
Any clue getting from Message Tracking ? ( means the name of the sender).

I QasmiCommented:
Go to Global settings > Message Delivery > Properties > Sender Filtering >
Select the checkbox  :  Filter Messages with blank sender
Go to Global settings > Message Delivery > Properties > Recepient Filtering>
check the option : Filter recepients who are not in the Directory
Check if this helps
daiwhyteAuthor Commented:
Thank you

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