Postfix version 2.2 supports IPv4 and IPv6 on the following
platforms:
- AIX 5.1+
- Darwin 7.3+
- FreeBSD 4+
- Linux 2.4+
- NetBSD 1.5+
- OpenBSD 2+
- Solaris 8+
- Tru64Unix V5.1+
On other platforms Postfix will simply use IPv4 as it has always
done.
See
below for tips how to port Postfix
IPv6 support to other environments.