Am 15.08.2014 um 10:36 schrieb li...@rhsoft.net:
>
>
> Am 15.08.2014 um 08:22 schrieb ml ml:
>> why does postfix use a empty from=<> envelope when it tried to verify the
>> recioient?
>
> * because it is the correct way of doing it
> * because an ordianry address may get blocked
> * because the other side knows and has to know
> that this is a bounce or verify call and
> handeled differently (never ever autorespond...)
>
> http://en.wikipedia.org/wiki/Bounce_message
> Bounce messages in SMTP are sent with the envelope sender address <>, known
> as the null sender address
>
...
address_verify_sender (default: $double_bounce_sender)
The sender address to use in address verification probes; prior to
Postfix 2.5 the default was "postmaster". To avoid problems with address
probes that are sent in response to address probes, the Postfix SMTP
server excludes the probe sender address from all SMTPD access blocks.
Specify an empty value (address_verify_sender =) or <> if you want
to use the null sender address. Beware, some sites reject mail from <>,
even though RFCs require that such addresses be accepted.
Examples:
address_verify_sender = <>
address_verify_sender = postmaster@my.domain
Best Regards
MfG Robert Schetterer
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