To run MailRouter, you need a mail server (AIMS, preferably version 1.1.1 or
newer, EIMS 1.X or 2.X or SIMS 1.5 or newer), running on a machine with at
least a 68030, a 68040 or a PowerPC. For best results the machine should be
running MacOS System 7.5.5 or newer.
MailRouter needs at least 110 KB to run, but as the program keeps all needed
information in memory all the time, it will allocate more memory, when
handling many domains. For a typical site, you should expect a usage between
110 KB and 250 KB. MailRouter will expand its memory usage when needed, so
there's no need for you to change the memory partition from the Finder.