VPOP3 has a feature called LAN forwarding (previously known as SMTP forwarding). This allows VPOP3 to forward messages intended for specified recipients onto another SMTP server on your network.
NOTE: VPOP3 will not forward messages using this facility over a dial-up connection. (To do that, see the Out Mail Settings Page or Forwarding Messages).
You can configure LAN forwarding in three possible ways:
Go to Local Mail -> LAN Forwarding in the VPOP3 settings. This allows you to define rules to indicate which messages should be forwarded where - see below for details on the format of these rules. (This configuration file can also be modified directly - see the LAN Forwarding Options help for more information)
Specify an address like SMTP:user@domain@host in the 'Forward To:' box in the User General Settings page.
Use the Forward To another LAN Mail Server option on the In Mail settings page
Note - VPOP3 forwards messages asynchronously. It copies the messages into the ‘HouseKeeper’ directory as files called ‘FQxxxxxx.DAT’ and processes them in the background.
The LAN Forwarding feature is not available in the Home User licence of VPOP3
For business licences of less than 25 users, the number of email addresses that VPOP3 can LAN Forward to is equal to the size of the licence. Note that this is NOT the number of users - because VPOP3 does not know what users are on the other mail server. This means that for licences of less than 25 users we recommend that you explicitly define the target email addresses for LAN forwarding rather than using wildcards.