Receiving Emails for an Entire Domain with One Address

I recently acquired a new domain name,, and I wanted all the emails to that domain forwarded to one user account on my machine. I also wanted to be able to reply to those forwarded emails using the address the email was originally sent to. So, for example, an email to would be delivered to my personal account, and if I sent a reply, it would come from

Here is how I did it with the mail server Postfix and my email client, Alpine.

Receiving Mail with Postfix

Postfix has a virtual domain hosting feature that makes forwarding emails to a domain simple. Following the directions in this section, I did the following:
  1. Add the following lines to /etc/postfix/
    virtual_alias_domains = virtual_alias_maps = hash:/etc/postfix/virtual
    This tells Postfix to treat as a "virtual domain" and apply the alias map located at /etc/postfix/virtual.
  2. Create a file /etc/postfix/virtual, containing only the line " cduan". This means that Postfix will rewrite the recipient (To:) address for every email to, delivering it to the user cduan.
  3. Run postmap /etc/postfix/virtual; /etc/init.d/postfix reload

Replying to Mail with Alpine

Generally Alpine (or Pine) will use its default email address for replying. To use the original address as the sender in replying, I did the following:
  1. Turn on the feature "Copy To Address to From if it is Us," under Reply Preferences.
  2. Set the "Alternate Addresses" value to ".*@cduan\.com$". This way, Alpine knows that all mail is actually addressed to me, so that it will copy the address as requested in step 1.