On Tue, Mar 16, 2010 at 4:12 AM, ram <r...@netcore.co.in> wrote: > > On Mon, 2010-03-15 at 10:10 -0400, Manuel Mely wrote: >> Hi, >> >> Is there a way to change my hostname based on the relay i'm using? >> >> For example, i have postfix servers in an ha config that relays to three >> differents mail service providers, this providers restricts me in what >> helo i have >> to use; > How do you rotate your relay servers .. DNS Round robin ? >
In my private subnet, i have three postfix servers in an ha config, using keepalived and i have three different mail service providers for relay to the world. This providers also delivers mail to me using transport table. They use DNS round robin on the internet side. >> so if i'm using ISP1 as relay, i must identify as helo1.mydomain >> if i'm using ISP2 then helo2.mydomain... this it's really annoying but >> rules are rules. >> Then, i need a way to change the helo based on the sender_dependent_relayhost > Sender dependent ? If I understand correctly all you need is distribute > between three servers. > Yes, sender dependent. I'm dealing with 3 different email domains in my company and all my network clients uses the same smtp load balancers. So, knowing the sender address and using sender_dependent_relayhost i can deliver the email to the correct relay. But the problem there is at the relaying time, my mail service providers check helo; my hostname must be configured as each providers told me in order to relay each. That's what it's not working with the load balancers :( > This seems difficult with a single postfix instance. Probably running a > second instance will help. > > * Run another instance with 3 different smtpd processes on 3 new ips > * The first instance sends the mail to all these 3 ips in round robin > * On the second instance depending on the entry ip write a FILTER rule > to send using a different smtp process > * Control the helo in the smtp process you use > > > That seems pretty complicated :-) And you will also add an unnecessary > hop for every mail. If you get a better a solution let me know too. > That's what i thought before sending this message, but seems complicated... but not imposible. I will try it ;) PS: Maybe it's time to talk with my ISP, and get an internet routeable ip, no relay, no complications... and no spam Stan. ;) Thanks ram!
