On 26.08.2012, Reindl Harald wrote: > all other machines before can write what they like in mail headers You can claim to be who you want to while connecting to a mailserver, but you can't fake the IP from which you are connecting. It is logged by the mailserver while connecting between two square brackets. The usual format used in Received: headers is name (dns-name [ip-address]) "Name" is easy to forge. "Dns-name" is what a reverse lookup on ip-adress delivers. "Ip-adress" reflects the IP of the machine which connected to the mailserver which generated this Received: header. > no, this is not theory, this is how email works and things are Ok, so please show me the evidence of your statement.
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