2.4. Configuring Postfix as a destination for multiple domains

Procedure

1. In the /etc/postfix/virtual virtual alias file, specify the email addresses for each domain. Add each email address on a new line:

   <info@example.com>   <user22@example.net>
   <sales@example.com>  <user11@example.org>

   In this example, Postfix redirects all emails sent to info@example.com to user22@example.net and email sent to sales@example.com to user11@example.org.

2. Create a hash file for the virtual alias map:

   # postmap /etc/postfix/virtual

   This command creates the /etc/postfix/virtual.db file. Note that you must always re-run this command after you update the /etc/postfix/virtual file.

3. In the Postfix /etc/postfix/main.cf configuration file, add the virtual_alias_maps parameter and point it to the hash file:

   virtual_alias_maps = hash:/etc/postfix/virtual

4. Reload the postfix service to apply the changes:

   # systemctl reload postfix