Postfix and Ultrix
Postfix on Ultrix
This document is probably only of historical value, because Ultrix version 4 dates from the early 1990s. However, as long as Wietse keeps Postfix alive for SunOS 4, it is likely to run on Ultrix 4 with very little change. Feedback is welcome if anyone actually still uses Postfix on any version of Ultrix.
The source of this document is an email message by Christian von Roques that was sent on Jun 2, 1999.
To work around the first problem, all the Makefile.in files have been updated to use `$(SHELL)' instead of `sh'. So you only need to supply a non-default shell in order to eliminate Ultrix shell trouble.
To work around the latter, util/sys_defs.h was updated for Ultrix, with a default FD_SETSIZE of 100. This should be sufficient for a workstation. Even in 1999, no-one would run a major mail hub on Ultrix 4.