Victor Duchovni schrieb:
On Tue, Oct 07, 2008 at 10:31:40PM +0200, Tomasz Chmielewski wrote:
I have a server with several public IP addresses (aliases on one network
card), running Postfix.
The machine also runs several websites, which interact with the users
(forums, automated responses for queries etc.).
I would like to configure each "website" to send mails via a different
IP address.
For example, if "website1" connects to 192.168.1.1:25, Postfix should
try to deliver mail from this website via outgoing 192.168.1.1 address.
If "website2" connects to 192.168.2.2:25, Postfix should try to deliver
mail from this website via outgoing 192.168.2.2 address.
And so on.
Is it possible to do so in Postfix? So far, the system uses two outgoing
addresses, but also using two separate MTAs (Exim and Postfix, each
using a different outgoing address), which is suboptimal, and does not
scale very well with additional IP addresses ;)
If all mail entering the server via SMTP leaves the server via SMTP
(no local deliveries, virtual mailbox deliveries, ...) such a policy
may be possible, but it is generally not necessary.
Hmm, how?
What real problem
does this solve?
No "real problem", more an "aesthetic" wish, where a website should be
similar to its reverse DNS in email's headers. More, an exercise on how
to use 3 IP addresses, but mostly, learning what can be done with
Postfix and what can not be done (so far I've learned that in some
aspects, it can be harder to configure than other MTAs, but offers
really much more functionality/flexibility once you learn "how").
If you are onboarding low-volume email marketing
clients, and want to isolated their reputations from each other,
"good luck"...
I thought most "email marketing" comes from infected Windows boxes. At
least my p0f seems to be indicating that :(
--
Tomasz Chmielewski
http://wpkg.org
