> > > Ah, much clearer now. Your assistance is appreciated. > > Regards, > -David
What you said first time was that you have the same smarthost but different routes. So if this is still the case, using different smtp_bind_address will help you later in doing some source routing. > > > > From: Wietse Venema <wie...@porcupine.org> > > Reply-To: Postfix users <postfix-users@postfix.org> > > Date: Tue, 26 Jan 2010 12:51:29 -0500 (EST) > > To: Postfix users <postfix-users@postfix.org> > > Subject: Re: Cost based routing > > > > DAVID HASSILEV: > >> > >> Thank your for the reply. While I am not too familiar (yet) with the > >> Policy > >> Daemons, it seems somewhat straight forward. What I do not understand in > >> your suggestion is the multiple smtp_bind_address statements. It's not > >> clear > >> to me how that will effect delivery to separate smarthosts or relay hosts. > >> We forward ALL mail to a relayhost owned by us, but via two different (one > >> public and one private) routes. > > > > OK, if you're doing cost-dependent smarthost selection, then you > > don't need smtp_bind_address statements. > > > > Instead, the policy daemon would reply with one of the following: > > > > FILTER smtp:[smarthost1] > > FILTER smtp:[smarthost2] > > DUNNO > > > > Also, no tweaking would be necessary at the routing level. > > > > Wietse > > > >> I do not wish to have multiple default routes to the outside, rather, I am > >> only trying to force smtpd to deliver either via the relay host A or relay > >> host B based on email size. > >> > >> I understand that I can force all non-local mail to deliver via > >> relayhost=[a.some.domain] and alternatively > >> smtp_fallback_relay=[b.some.domain]. > >> > >> I guess I'm still trying to determine whether I can force mail by size > >> restriction via one relayhost or another. If this is done with the > >> smtp_bind_address I guess I have much more reading to do. > >> > >> Hopefully that made sense. > >> > >> Regards, > >> -David > >> > >> > >>> From: Wietse Venema <wie...@porcupine.org> > >>> Reply-To: Postfix users <postfix-users@postfix.org> > >>> Date: Mon, 25 Jan 2010 14:57:32 -0500 (EST) > >>> To: Postfix users <postfix-users@postfix.org> > >>> Subject: Re: Cost based routing > >>> > >>> DAVID HASSILEV: > >>>> > >>>> Hello, I have tried to search through the list archives but have not > >>>> found > >>>> what I'm looking for so I thought I'd post to the list. > >>> > >>> To implement routing policies depending on message size, > >>> > >>> - Implement a Postfix policy daemon to examine the message size > >>> attribute (invoked from smtpd_end_of_data_restrictions). > >>> See: > >>> http://www.postfix.org/SMTPD_POLICY_README.html > >>> http://www.postfix.org/postconf.5.html#smtpd_end_of_data_restrictions > >>> http://www.postfix.org/postconf.5.html#check_policy_service > >>> > >>> - Have the policy daemon respond with "FILTER A:" or "FILTER B:" > >>> or "dunno". A and B are the names of smtp client entries in > >>> master.cf, each with their own "-o smtp_bind_address=xxx" option. > >>> See: > >>> http://www.postfix.org/master.5.html (for "-o name=value) > >>> http://www.postfix.org/postconf.5.html#smtp_bind_address > >>> > >>> This requires Postfix 2.7 snapshot 20100117 (or later). To make > >>> this work you will also have to tweak the network stack to support > >>> two "default" routes to the outside world. I can tell you only the > >>> Postfix side. > >>> > >>> Wietse > >>> > >> > >> > >> > >> > > > > > > -- adrian ilarion ciobanu adria...@ciobanu.name http://pub.mud.ro/~cia +40 788 319 497
