On 5/23/2011 9:30 AM, Jeffs wrote:
On 5/23/2011 3:33 AM, Jeroen Geilman wrote:
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.
thank you for the message.
Then how does one setup Postfix so that the first, originating
IP is indicated as, per example above, xyz.com or def.com and
not many-companies.com? I know this is done on mail systems
but it eludes me as to how. Would setting up virtual domains
be the answer? I find it unreasonable to expect that each
domain has it's own dedicated IP address which would translate
into many physical servers for each domain. These days
everyone is using virtual domains and ip aliasing. that's all
I want to accomplish but fail to see how this can be done.
Thank you.
The Received: header is added by the receiving system, not by
your server, and always shows the IP of the connection.
If you want each client to have their own identity, each
client will need its own IP. You can't virtualize this.
