[CentOS] dealing with spoofing

[Josh Miller]

On 08/31/2011 01:48 PM, Bowie Bailey wrote:
> On 8/31/2011 4:37 PM, Josh Miller wrote:
>> On 08/31/2011 01:33 PM, m.roth at 5-cent.us wrote:
>>> You're saying it uses the envelope, not if exists Reply-To, else From? The
>>> problem I have with that is that a few of them have returned the email,
>>> with full headers, and I see the *only* reference to my email address is
>>> in the Reply-To.
>> You are seeing the "full" email headers.  You will not see the envelope
>> headers unless you capture packets or view mail server logs, etc..
>
> Actually, what you are interested in is the envelope sender that the
> remote server saw.  And there is no way for you to see that unless you
> have access to the remote server's logs.
>

That is not true as the remote server will present the envelope header 
to your mail server upon connection.

-- 
Josh Miller
Open Source Solutions Architect
http://itsecureadmin.com/