On 05/23/2011 03:35 AM, Jeffs wrote:
Hello All,
Assume the following setup:
Client from xyz.com logins to Many_Companies.com, accesses their email
campaign software running on Many_Companies.com and sends out
newsletters.
A short time later a client from def.com logins to Many_Companies.com,
accesses their email campaign software running on Many_Companies.com
and sends out newsletters.
They both access the same software just have user accounts that are
different on the same server.
Postfix uses sender_dependent_relayhost_maps to channel xyz.com
messages to interface eth0:1 and def.com messages to the the eth0:2
interface.
Those virtual interfaces are mapped to IP addresses that are
registered addresses for xyc.com and def.com respectively.
Here is the question:
Will the received from headers in those messages reflect an
origination IP address of Many_Companies.com's IP address or xyc.com
and def.com IP addresses respectively?
I need the setup to reflect origination emails only coming from the
respective IP addresses for xyz.com and def.com, NOT
Many_Companies.com's IP address.
If this functionality is running on a box that has an IP that belongs to
many-conmpanies.com, then that IP will be reflected in the message
exchange, possibly multiple times, yes.
Since SMTP is an IP protocol, it's hard to see how it could be otherwise.
Thank you.
--
J.
