[vPostMaster] Hosting Multiple Domains

[Kirk Wallace]

On Mon, 2008-08-18 at 22:52 -0600, Scott Kleihege wrote:
... snip
> 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.

It seems my old ISP is blocking their POP from outside their net too. I
expected to not be able to send SMTP, but the POP problem kind of made
my problem harder to figure out. My users can now send and receive mail,
with their SMTP going out of my Postfix. It's just my own mail that
won't work, but I will probably switch to mail with no-ip.com until I
get my own IMAP or Squirrel mail server.

> 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.

Yes, I just needed to add the foreign domain name. Unfortunately, I
still don't have a clue, so I am not sure exactly what setting I
changed, but it should be easy enough to figure out, once I get around
to my system documentation. 

> 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

Yes, out-going only. Postfix seems to be working. I didn't need to set
up user accounts and authorization, which worries me.

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

Nothing fancy, just out-going mail. Now that it seems to work, I
probably should work on figuring out how secure it is. I don't want to
be black-listed because of spam relaying.

Thanks Scott, and others here that replied. I wish I had time enough to
do your replies some justice.

-- 
Kirk Wallace (California, USA
http://www.wallacecompany.com/machine_shop/ 
Hardinge HNC/EMC CNC lathe,
Bridgeport mill conversion, doing XY now,
Zubal lathe conversion pending
Craftsman AA 109 restoration
Shizuoka ST-N/EMC CNC)