A method for selectively forwarding e-mail comprising receiving a first e-mail message at a first receiving host system from an originator at a sending host system. The first e-mail message is addressed to a recipient at a first mailbox on the first receiving host system. A transfer list is searched for the first mailbox and a corresponding second mailbox address in response to a determination that the first mailbox is not active on the first receiving host system. The transfer list includes the first mailbox and the corresponding second mailbox address if the recipient had requested that the first mailbox and the corresponding second mailbox address be added to the transfer list via a first user interface screen from a second Internet service provider. Forwarding instructions are analyzed to determine if the first e-mail message should be forwarded to the second mailbox address. The analyzing is performed in response to the first mailbox and the second mailbox address being located on the transfer list. Input to the analyzing includes the identity of the originator and the forwarding instructions were created by the recipient via a second user interface screen from the second Internet service provider. The first e-mail message is forwarded to the second mailbox address in response to the analyzing resulting in a determination that the e-mail message should be forwarded to the second mailbox address. A second e-mail message is transmitted to the originator at the sending host system in response to the forwarding, wherein the second e-mail message includes the second mailbox address.