fastforward handles qmail forwarding according to a cdb database. It can create forwarding databases from a sendmail-style /etc/aliases or from user-oriented virtual-domain tables.

fastforward supports external mailing lists, stored in a binary format for fast access. It has a tool to convert sendmail-style include files into binary lists.

fastforward does not support program deliveries from include files; you can use qmail's secure built-in mechanisms instead. fastforward does support program deliveries from /etc/aliases.