On 11/03/2011 17:09, Victor Duchovni wrote: > On Fri, Mar 11, 2011 at 04:58:15PM +0100, Giovanni Mancuso wrote: > >> I have my postfix configured as MX record of my domain with particular >> smtpd_recipents_restriction, ecc... >> If my postfix receives a mail that has X-MyCustomHeader, Postfix accept >> the mail and delivers it to backend. >> If my Postfix receives a mail that hasn't X-MyCustomHeader, Postfix >> checks if client ip is in a blacklist and reject the email if the ip is >> in blacklist or accept the mail if it isn't in blacklist. > Rejection of email can only happen before the mail is queued. Therefore, > this can only be done with a proxy-filter or milter. > > http://www.postfix.org/SMTPD_PROXY_README.html > http://www.postfix.org/MILTER_README.html Another questions. If i use a MILTER, and if i have smtpd_recipient_restrictions configured, postfix uses this restriction? I did not understand this :-(
In your opinion, to do this is better MILTER or SMTPD_PROXY? Do you know a simple milter (write in perl or python) that i can use as example for develop my milter? Thanks > While client addresses can checked via built-in mechanisms in > smtpd_end_of_data_restrictions, there is no built-in mechanism to make > these checks dependent on the message headers. Adding such a feature > would not be easy, the header checks are performed in the cleanup(8) > server, while client address checks are performed in the smtpd(8) > server, the data flow from smtpd(8) to cleanup(8) is essentially > one-way... > > http://www.postfix.org/OVERVIEW.html >
