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JonathanDarveauWillms-9901 avatar image
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JonathanDarveauWillms-9901 asked JonathanDarveauWillms-9901 answered

Exchange 2010 Header : Received

Our Exchange header shows our firewall IP for the received IP instead of the senders IP. As seen below, psm.knowbe4.com received IP shows up as the internal firewall IP.

We are using a single server for all Exchange 2010 services and a virtual IP mapping the public IP to the internal IP.

Received: from psm.knowbe4.com (192.168.X.X) by webmail.lethlib.ca
(192.168.X.X) with Microsoft SMTP Server (TLS) id 14.3.498.0; Fri, 27 Aug
2021 10:50:36 -0600

If anyone has an idea on how to correct this or can point me in the right direction I would appreciate it.

office-exchange-server-administration
· 1
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@JonathanDarveauWillms-9901

Any update about this thread now?

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KyleXu-MSFT avatar image
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KyleXu-MSFT answered

@JonathanDarveauWillms-9901

I would suggest you use Message Header Analyzer tool to check the message header. Check whether all hops are record in the message header. If it isn't correct, it means your firewall rewrite the header.


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AndyDavid avatar image
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AndyDavid answered

This would need to be fixed on the firewall. I would start there.

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JonathanDarveauWillms-9901 avatar image
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JonathanDarveauWillms-9901 answered

thanks, I will start there.

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