Since the text of your rejection implies that spam is the problem
you're trying to address, you really need to understand more about
spam and spammers, too. Here is a good overview:
Offlist mail to this address is discarded unless
"/dev/rob0" or "not-spam" is in Subject: header
on 02/15/2010 02:44 PM /dev/rob0 wrote the following:
> Ahh, someone here today with a Postfix question, not a Cisco one! ;)
> On Mon, Feb 15, 2010 at 12:57:40PM +0200, Aggelos wrote:
>> I want to deny incoming mail from domain blu0.hotmail.com.
> "From domain" means what? Sender [hidden email] ?
Actually I want to deny all mail that has in the source something like
Received: from blu0-omc1-s16.blu0.hotmail.com
>> I have put in /etc/postfix/sender_access the following line:
>> blu0.hotmail.com 554 Spam is not welcome
>> and then I run
>> postmap /etc/postfix/sender_access
> Is there something magical about this /etc/postfix/sender_access
> filename that you are not telling us?
>> postfix reload
>> Is that enough?
> Not even close.
> You must first understand how Postfix smtpd(8) access restrictions
> work. See: http://www.postfix.org/SMTPD_ACCESS_README.html > as a starting point.
> Since the text of your rejection implies that spam is the problem
> you're trying to address, you really need to understand more about
> spam and spammers, too. Here is a good overview: