IMPORTANT NOTE
Please ensure that you either use a Forwarder OR a POP3 rule for each domain. If you have both a POP3 account and a forwarder setup with the same name (the part of the address before the @), neither will work correctly. When you create a POP3 mail box the rule for this is automatically created so you only need to create rules for additional addresses.

If you wish to forward a copy of an email to more than one person you need to use a Multi-Recipient Address (MRA) list. This will take any mail sent to an email address (eg. me@mydomain.com) and then forward this onto all of the addresses you specify under the MRA. MRA tutorial.