On 1/10/11 5:21 PM, Jonathan Tripathy wrote:
Hi Everyone,
Not really an issue directly related to postfix, however I'm sure I
can get some goods ideas here.
I wish to host managed email servers for some customers. Each
customer will have their own email server which will be an
all-in-one virtual machine running postfix, dovecot and some webmail
suite.
Even though each customer will have their own server, I do not wish
to give each email server it's own public facing IP. I wish to avail
the use of proxy servers so all customers use the same public IP. As
for the "smtp-in" from the public internet, this isn't a problem as
I can set up many mx servers (using postfix of course) which will
store-and-forward the mail to the correct server (using transport
maps). As for the IMAP access from the customer, I was thinking of
using perdition which is an IMAP proxy - I believe that this will
suit my needs.
This is a bad idea. Once one customer starts spamming, you're screwed
as are the rest of the servers. Give each customer their own IP. This
will solve mail validation issues and the blow auth issues.
Isn't it generally insecure to give direct access to each repective
customer instance from outside directly?
Also, how do ISPs deal with this? Each customer doesn't have their own IP...
