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Date: Sat, 18 Oct 2003 19:06:27 +0000
From: "Hallgrimur H. Gunnarsson" <hhg@...a.is>
To: popa3d-users@...ts.openwall.com
Subject: Re: Virtual Domains
On 18.10.2003 Tim van Erven <tve@...mig.net> wrote:
> On Sat, 18/10/2003 22:15 +0400, Solar Designer wrote:
> > On Sat, Oct 18, 2003 at 07:08:06PM +0200, Tim van Erven wrote:
> >> On Sat, 18/10/2003 17:48 +0400, Solar Designer wrote:
> >>>>>> file = VIRTUAL_HOME_PATH/127.0.0.1/mail/${local_part}
> >
> >>> I don't really like this suggestion. If you do use popa3d's sample
> >>> virtual domain support code unmodified, then please also place the
> >>> domain information where the code expects it, -- in place of the
> >>> "127.0.0.1". Yes, it means that you may need to have your MTA or LDA
> >>> translate the recipient's domain name into the corresponding virtual
> >>> mail server's IP address. (OK, perhaps the sample virtual.c should be
> >>> enhanced to also support name-based virtual domains.)
> >>
> >> What do you mean by a `virtual mail server'?
> >
> > In this context, a POP3 (and maybe also SMTP) server that the users of
> > a domain may treat as if it were a dedicated mail server for just their
> > domain. The sample virtual.c implements the POP3 side of it.
>
> So you're thinking of a scenario where multiple users are sharing a
> server, each being allowed to admin their own domain?
Whether users can admin their own domain is a separate issue and depends
on configuration.
>
> And in that case it would not be uncommon to use separate IPs for the
> virtual mailservers for the domains, so the IP for the virtual
> mailservers could be used in place of the "127.0.0.1" to differentiate
> between domains?
Yes, that's pretty much the definition of it. Instead of running a
separate popa3d server on each interface, you run one instance that
recognizes what interface you're coming from (IP-based) or uses
the supplised username like user@...ain (name-based).
-- hhg
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