On 12/22/2009 9:59 AM, Venkatachala Upadhya wrote:
Hello Brian, users,

I do not have any hosted domain. I have only one registered domain, example 
mailhost.mailorg.com.
In the same domain, I want to host the mail users such that those users are in 
mysql table.
Such users' mail is available, for example,  in /mailhome/vitrual_user/user1 
... /mailhome/virtual_userN
Those users do not have the login accounts, but they have mail account.
Each virtual user mail address looks like this,

virt_us...@mailhost.mailorg.com
virt_us...@mailhost.mailorg.com
virt_us...@mailhost.mailorg.com
.
.
.
virt_us...@mailhost.mailorg.com

More over the same domain mailhost.mailorg.com also has a set of users
who have login accounts. Those users also have mail accounts and their mail 
address would be

login_us...@mailhost.mailorg.com
login_us...@mailhost.mailorg.com
login_us...@mailhost.mailorg.com

Sharing the domain name will result in an unnecessarily complicated setup. *Much* better to either spend a couple dollars on another domain name, or use a subdomain such as virtual.example.com.

Yes, it is possible to share a single domain name. Study http://www.postfix.org/STANDARD_CONFIGURATION_README.html for hints.

  -- Noel Jones

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