Transport Rules/Send Connectors in E2K7
Hi everyone, need your advise on something: Got a client that has 1 exchange 2007 server and at the moment we have got setup one Send Connector that only allows email to be sent to about 8 external client domains through a Smart Host (Barracuda). Now this client needs to get a couple of their users to send email to anyone externally to the internet so to any domain really, however everyone will still be allowed to send emails to those 8 external client domains. after reading about it some people speak about setting up a Transport Rule as it follows: Create a DL "Deny send mail to Internet" and add users to it. Create a transport rule with conditions "from a member of a DL" and "sent to people outside your org.", DL should be the one previously created.Action should be "send a bounce message...". now the problem is that this would deny all users expect those outside this DL to send emails to the internet as well as those external domains, this is not good for what i need. So i though can i create a Transport Rule to apply to a Specific Send Connector? Can i restrict via ADSI Edit who can use the Send Connectors this way i would create 2 different connectors, one for the internet all domains and only allow a few users to use it and the second Send Connector allow everyone to use it to send out to those 8 client domains? Can anyone advise on this for me, it would really be greatly appreciated. Exchange 2007 responses only please Regards and thanks Carlos Gomes
May 23rd, 2008 7:17pm

Hi Carlos, Did you try by selecting exception in transport rule with Except when the text specific words appears in a message header? where header = To &Text specificwordscontain 8 client domain names.
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May 23rd, 2008 9:03pm

Thanks in advance Amit, what if an email has on the header TO= Allowed Domain; and Not Allowed Domain, ie i allow to gmail.com but not to Hotmail.com will it send the email to gmail.com but deny to hotmail.com? What if it is CC= gmail.com do i have to add this to the exception as well? Let me know thanks Carlos
May 27th, 2008 10:33am

Hi, to work around this issue we done the following. the current Send Connector that has been configured to relay email to only 8 domains we changed it from SmartHost to Forward to DNS. Then we created a new Send Connector that relays email to the internet via the SmartHost which is a Barracuda and on the Barracuda we onlygrant certain users permissions to relay email through the Barracuda this was the only way we found to this easily. However i am still waiting a reply to my previous question as it would be good to know whether Amit's reccomendation would work. Let me know ThanksCarlos
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May 28th, 2008 1:35pm

Hi Carlos, If I understood correctly, you want to pass mails to just allowed 8 domains and block other domains even if they are in To, CC or BCC in the same mail. But I think, if any condition matches then transport rule processes whole mail for defined action and if any exception matches then bypass the rule. Youcan develop a custom transport agent with Exchange SDKto meet your requirements.
May 28th, 2008 5:35pm

Thanks Amit, i guess i will just keep it now as it is using the Barracuda to block the users to send to the internet and forward the allowed Domains to DNS. However thanks doe your input. regards Carlos
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May 28th, 2008 7:57pm

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