On 23.04.2006 03:31, postmaster - networkoftheapes.net wrote:

> Now that I've made my filter, I have a question: How is the client domain 
> generated? Is it something reported by the sending client software? For 
> example, most entries in my SMTP logs from "@hotmail.com" report my server 
> (mail.networkoftheapes.net) in the client domain field. Should it be doing 
> this?

All SMTP envelope headers are fakable - and so the only information you
can trust is the sender IP address.

Maybe you want to send us sample headers and messages so we can discuss
specific questions. :)
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