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 ?
> 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. 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. Thanks Ram
