Exchange 2007 has drastically changed how messages are transmitted between users and you will find out that all messages now pass through what is now called a hub transport server regaurdless of the destination, which allows transport rules to be used.

Transport rules are made up of 1. Condidtions 2. Actions and 3. Exceptions

Lets use EMC to create a new transport rule……
Open EMC–> Organizational Config –>Hub Transport

In the Actions Pane Select “New Transport Rule”

A new window will open allowing us to give our new rule a name and description. There is also a check box to “Enable” the rule.

Next we are presented the Conditions page

We are presented with the following conditions:

The next screen will present us with an Action:

Log an event
Prepend the subject with string
Apply message classification
Append disclaimer text using font,size,color
Set the scl value
Set the header value
Remove header
Add a recp in the to field address
Copy the message to address
Bcc the message to additional address
Redirect the message to addresses
Send bounce message to sender with enhanced status code
Siliently drop the message
The following link describes each action:http://technet.microsoft.com/en-us/library/aa998315.aspx

We are now presented with an exceptions page:

I am now going to create a new Transport Rule that will deny a user Jodie from sending messages larger then 1MB to anyone except Brian.

1. From EMC select New transport rule
2. Add a description and a name

I gave my the name of : Deny Large Attachments from Jodie

and description of: This rule will deny Jodie the ability to send attachments over 1MB

3. Click Next and select the appropriate condition (s)

For this rule I selected “From People” and When the size of any attachment is greater than or = to limit.

Select the blue wording at the bottom, this will open a new window and allow you to select your user

Now the we have selected our user Jodie Bartos we will need to select our Action (s)

I have choosen to Send bounce message to sender with enhanced status code

Select the blue wording at the bottom an input the message you want the user to receive.

Now we are presented with the exception screen, as stated I want to allow Jodie to send messaage larger then 1mb to only Brian….

for this rule select the exception of Except when the message sent to people

Once again select the blue wording and a new window will open that will allow you to select you users.

The next screen will show us a summary of the selections we have made

The last screen shows up the powershell command that was run to create the new rule

Now that we have created our rule, lets test to see if it functions as we planned…..

I logged onto my Jodie Bartos mailbox and will attempt to send a 2mb file to Jim and then to Brian. If the rule functions as it should then we will receive a bounce message when sending to Jim and the message will be delivered to Brian.

Test 1:

Send 2mb file from Jodie Bartos–> Jim Mcbee

As you can see in the bottom of the bounce is the message that we used in our rule

Test 2: Send 2mb file from Jodie Bartos –> Brian Tirch

Now lets logon to Brian’s mailbox and see if we receieve the message