Tryign to send mail via a python script by using the local MTA

[Ferrous Cranus]

On 17/9/2013 7:30 μμ, Denis McMahon wrote:
> On Tue, 17 Sep 2013 18:17:43 +0300, Ferrous Cranus wrote:
>
>> So cant this be done in python or not?
>> or is a mtetr of configuring the MTA? conf file?
>
> Python can not control data that is added to the message after it has
> left the python program. If you want to retain maximum possible control
> of the mail process from within python, you need to use a python module
> that handles the smtp exchange with the destination mta, however even
> then you can not control the content of header lines added by that
> destination mta, which will invariably include the real[1] ip address of
> your system.
>
> [1] The ip address that it is sending ack packets to as part of the smtp
> session, so unless you're using a proxy somewhere, this will be your
> system's ip address. Can't fake it. If the other system doesn't know your
> ip address, it can't send acks, and the tcp session fails.
>
Ah, now we are getting somewhere.

So the foreign MTA tests for real time connectivity with the local MTA 
and it tries to detect a working host and ip address.

So even if we alter the hostname and the ip address of our localhost 
then the smtp procedure will fail correct?