Hi Victor, 

>> I was wondering (and I know the gains would be minor given that this
>> falls into security through obscurity), is there anything to gain by
>> either removing this or specifying something false ?
> 
> There is nothing to be gained by pretending your server is not running
> Postfix.  Postfix is too easy to "fingerprint" by observing its responses
> to various SMTP commands.  Just let it be.

Ok, thanks for letting me know.

- J

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