Re: Multiple IP addresses binding
- On 11/30/2012 01:28 AM, Wietse Venema wrote:
> WebprodsPT:Thank you. This information was very useful.
>> I am the administrator of a Postfix setup with multiple domains,
>> multiple IP addresses and SSL configured and up and running. Everything
>> was configured by myself and I have no restrictions on the mail server
>> machine so basically I can do whatever you suggest.
>> Today I received a new requirement and I'm not being able to configure
>> it, even after reading lots of resources around the web. Email messages
>> for each separate domain must be sent FROM their respective IP address.
> As documented, using "-o smtp_bind_address" with smtpd(8), the mail
> receiving program, has no effect whatsoever. This feature has effect
> only on smtp(8), the mail sending program.
> You may kludge something with sender_dependent_default_transport_maps,
> choosing an appropriate SMTP client depending on the sender address,
> each SMTP client having its own "-o smtp_bind_address" setting.
> That obviously does not work for delivery status notifications
> which, as required by RFC, have the null sender address.
> The proper solution is to use one POSTFIX INSTANCE per domain/IP
> address. See http://www.postfix.org/MULTI_INSTANCE_README.html
Now I understand the differences between smtp and smtpd processes and
why some of the -o parameters where not being used in some circumstances
(like -o myhostname that is used in smtp aka sending process and must be
set in each main.conf instance obviously).
I'm having trouble now with dovecot in multiple instances but I will
create other thread for hat.