Am 26.08.2012 23:37, schrieb Heinz Diehl: > 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 yes > but you can't fake the IP from which you are connecting. not to the one you are connecting but you can not trust headers before your own MTA > It is logged by the mailserver while connecting between two square brackets. i know this > The usual format used in Received: headers is > > name (dns-name [ip-address]) i know this > "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 what did you not understand your MTA get a connection and have the IP of the last machine involved in mail tzransmission, bit all other received headers before YOOR machine are nOT trustable because i can write whatever i want and how many received-headers i want and submit the message directly to your MTA you have NO WAY to say if they are forged or not
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