On Wednesday 28 May 2003 15:06, Rick Steeves
<[EMAIL PROTECTED]> wrote:
> >>Define 'virtual domain'. There are different kinds of
> >> virtual domains.
>
> There are? Sorry, I was thinking there were only virtual
> domains defined, and the system accounts, or I would have
> been more clear. By virtual domain I mean a domain set up
> using userdb, with no logon accounts. a domain defined in
> 'hosteddomains' instead of in 'locals', with accounts
> added to userdb.
Think of it this way. There are virtual domains and
virtual users. Virtual domains are domains that are NOT
listed in locals or hosteddomains. A virtual domain is
"mapped" to local user. That's the
@domain.com: john
notation that you see. This means that anytime courier sees
a message for "[EMAIL PROTECTED]" (where "user" can be
anything) it rewrites that address as "[EMAIL PROTECTED]".
("hostname" is either the machine's name or the contents of
the "me" file.) Then courier tries to deliver the message
to user "john". Inside john's home directory you use
.courier files to tell courier how to deliver the message.
But there are no userdb entries or anything like that. And
the domain must be mapped to a real user since courier
needs to deliver this mail to a actual user. Everything
addressed to this one domain (domain.com) is delivered to
that user and the .courier files give delivery
instructions.
Virtual users on the other hand, are accounts which are NOT
system accounts - they can't log it to your box, etc. but
they can send and receive mail because courier keeps track
of them in some sort of database (userdb, mysql, ldap,
etc.). But they are part of a real domain - a domain
listed either in locals or hosteddomains. So in my case
I've got "sil.org" in hosteddomains and all my users are
virtual users. None of them have system accounts on the
server; I use userdb to tell courier how to deliver their
mail.
> It appears
> that mail addressed to [EMAIL PROTECTED]:
> [EMAIL PROTECTED] will actually work (although now I don't
> understand in the other direction). sigh.
If you have "virtualdomain.com" in esmtpacceptmailfor then
[EMAIL PROTECTED]: [EMAIL PROTECTED]
in an alias file should work. Courier will accept mail for
[EMAIL PROTECTED], rewrite it as "[EMAIL PROTECTED]" and
send it out. I use this myself. (If you are relaying the
domain doesn't even need to be in esmtpacceptmailfor.)
But it will NOT work if you have
@virtualdomain.com: john
[EMAIL PROTECTED]: [EMAIL PROTECTED]
Because courier sees the first entry and rewrites the
incoming mail message as "[EMAIL PROTECTED]". At that
point the "[EMAIL PROTECTED]" address is gone and we
are now working on "[EMAIL PROTECTED]".
Your original post said
> I have an alias in the /etc/courier/aliases/system file
> [EMAIL PROTECTED]: [EMAIL PROTECTED]
>
> where domain.com is a virtual domain on the courier
> system, there is no account named bob, fred is a account
> on another server
>
> When I send mail to [EMAIL PROTECTED], I get back "User
> unknown: 550"
It looks like "domain.com" is in hosteddomains since you are
getting a "user unknown" instead of "relaying denied".
Did you run makealiases after you added the alias? What
does "makealiases -chk" and "makealiases -dump" say? Do
you see the alias in there?
I just added "[EMAIL PROTECTED]" to my aliases file and
"domain.com" to my esmtpacceptmailfor file, ran makealiases
and makeacceptmailfor and then tried to send to
[EMAIL PROTECTED] and it worked.
[EMAIL PROTECTED] jeff]$ telnet superman 25
Trying 192.168.1.100...
Connected to superman.
Escape character is '^]'.
220 superman.ivb.sil.org ESMTP
helo jeff
250-superman.ivb.sil.org Ok.
<snip>
mail from:<[EMAIL PROTECTED]>
250 Ok.
rcpt to:<[EMAIL PROTECTED]>
250 Ok.
So I think that your original idea will work fine. See if
you just forgot a step along the way. Courier takes some
work to figure out, but once you do I think you'll agree
that it has a very elegant design.
Jeff Jansen
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