PMDF System Manager's Guide

Normally only addresses rewritten to the local channel (that is, the l channel on OpenVMS and UNIX) are looked up in the alias file and alias database. The aliaslocal keyword may be placed on a channel to cause addresses rewritten to that channel to be looked up in the alias file and alias database also. The exact form of the lookup probes that will be made is then controlled by the ALIAS_DOMAINS PMDF option; see Section 7.3.1.