Allow IP's for SPAM protection

Hi, im deploying Barracuda Cloud Spam, we have Exchange 2016 in house, i believe i have to allow certain IPs from Barracuda, where would i make this change?
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timgreen7077Exchange EngineerCommented:
You will need to make these changes on your Firewall. Your firewall will need to allow these Barracuda IPs to relay to your internal Exchange servers.
Cobra25Author Commented:
Yes i am well aware, but the send/receive connectors also have specific IP ranges to allow...
timgreen7077Exchange EngineerCommented:
no need to add those IPs to the receive connectors. If you will be using Barracuda as a smart host for outbound mail also you will need to add the IP address to your internet outbound send connector. Make sure you add the correct IP that they give you.

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Cobra25Author Commented:
i see thanks. which connector would it be, though, i see many receive connectors by default.
timgreen7077Exchange EngineerCommented:
make no changes to the receive connectors or you will have a bad day hahaha. Only add it to send connector as the smart host.
Cobra25Author Commented:
There is already some ip's there as we are migrating platforms, what determines the "Default" receive connector? Is there a priority somewhere?
AmitIT ArchitectCommented:
You need to first understand, how is current mail flow working and how you want to change it using  Barracuda Cloud Spam. Example:


Client>Exchange> Barracuda>Internet

Next, where is your MX pointing. If you want to use  Barracuda Cloud Spam for incoming mail also, then you need to change your MX records and pointing it to  Barracuda Cloud Spam.

I advise you to review your environment and then plan for any change.
timgreen7077Exchange EngineerCommented:
The IPs that are there most likely are for anonymous email relay for things like printers and applications and so forth that needs to email, and those were manually created connectors. That shouldn't have any affect on your transition to Barracuda.
The default connectors are Exchange created connectors that allows exchange to communicate with other exchange or mail systems via port 25. the only changes you most likely need will be the send connectors.
Cobra25Author Commented:
Amit, please don't respond here. I am reporting your comment.

I am aware of all of these already.
AmitIT ArchitectCommented:
I am not sure, what suggestion or line offended you. Let me know.
timgreen7077Exchange EngineerCommented:
provided enough info to assist author for solution. closing ticket unless author reopens.
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