[thelist] IIS Guru help: Whitelist email

Ken Schaefer ken at adOpenStatic.com
Mon Mar 15 18:47:46 CST 2004

I'll try to help, but the terminology in your email is confusing at best, so
I'm unsure exactly what you need to do.

My understanding is that you can assign a specific set of IP addresses to
each SMTP virtual server. So, the hosting company can assign a specific IP
address to the SMTP Virtual Server (rather than using the "all unassigned"
option), and the SMTP server will use that specific IP address. More than
one IP address can be assigned if desired. This is probably your easiest


Microsoft MVP - Windows Server (IIS)

From: "Sam Carter" <sam at nativeintelligence.com>
Subject: [thelist] IIS Guru help: Whitelist email

I've got a server with several webs and IP addresses.

Problem is, one of my customers has implemented a SPAM firewall to block
email spoofing.  Our web provides the ability for a customer to send an
email from himself, to another POCs at the customer.  Looks a lot like email
spoofing, but the content is generated by the user and sent from the user,
so it's viewed as a legitimate email from the user.  Except for the new SPAM
filter which sees a from address and a strange IP address.

Customer wants to whitelist our web to get this service running again.  All
I have to do is give them an IP address of our SMTP server.  My hosting
company tells me there's no way to control what IP address is used by my
server's SMTP.   I'm told the SMTP server seems to pick an available IP on
the server and go with it.



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