[vPostMaster] Hosting Multiple Domains

[Scott Kleihege]

On Thu, Aug 14, 2008 at 06:41:16PM -0700, Kirk Wallace wrote:
>I am trying to get an idea of whether vPostMaster will work in my
>situation. I have a T1 that was just installed, and I want to move my
>current users over to it. The problem is that some have webmail which
>isn't a problem, but then others have POP mail at various domains. With
>the old Internet connection the ISP has an SMTP server that the POP
>users log into to send their outgoing mail, which seems to work okay. I

It wouldn't surprise me if the old ISP was blocking outgoing SMTP except to
their servers.  It might be easy in many cases to have your users to
point their outgoing SMTP server to the same systems hosting their various
POP accounts, since it is unlikely that your connections would be blocked
on the T1.

>need to reproduced the same SMTP server setup on my T1. I installed vPM
>and was able to send outgoing mail from the server PC, but not from the
>user LAN. In studying Postfix, I got the idea that I need to set up
>accounts and logins for each user, then open connections from various
>domains, interfaces, users, etc. and allow mail to be sent to other

I believe postfix is configured in the default install to allow messages
originating from the same subnet.  If you need to add more subnets, you
can add them to the mynetworks option in /etc/postfix/main.cf or using
the postconf command.

Alternately, you may setup users and domains in the vPostMaster web
interface and have your users rely on SMTP authentication to log onto the
outgoing mailserver before sending.

If the only purpose of the mailserver is to relay outgoing messages for
your local users who have remote mail accounts, and it should never
receive incoming messages, you may want to stick to postfix, instead
of adding all of the other applications that vPostMaster requires for
keeping track of users, settings, and doing

>domains. From the limited setup screens I saw, this kind of setup is not
>possible. I was thinking I could manually change the config files, but I
>am afraid that vPM would complain about the changes or put the settings

vPostMaster only looks at the postfix configuration files when you run the
setup script which is done automatically during the install, so it
shouldn't complain about the settings.  That being said, it's possible to
change a setting in such a way that breaks things, so I'd recommend backup
copies of the config files before you start, doing only a small number
of changes at once and good testing.

>back. Besides, I wouldn't know which changes to make. If I get a
>purchased copy of vPM, is it configurable enough for my application and
>could I get enough support to get a configuration that would work? Thank
>you for any help.

I'm not sure I fully understand your requirements, so it's difficult to be
certain, but it does not sound overly complicated.

-- 
Regards,                    tummy.com, ltd
Scott Kleihege              Linux Consulting since 1995
                            http://www.tummy.com/