The VPOP3 Local Mail options tell VPOP3 how to handle mail within your local network. This includes mail between local VPOP3 users and mail to other local SMTP servers (eg other VPOP3 servers, Microsoft Exchange Server, or Linux mail servers).
➢General - How VPOP3 handles mail between local VPOP3 users
➢Domain Mappings - How VPOP3 maps domain names between 'internal' domains and 'external' domains (not usually needed and for advanced users only)
➢LAN Forwarding - How VPOP3 sends mail to other local SMTP mail servers.