In message <4451.957627007@coconut.itojun.org>itojun@iijlab.net writes
>
>>cvs update done 20000505 16:31 UTC
>>Aieeee...  One IPv6 problem, one file permissions(?) problem.
>>Well, this DID get me to move to postfix, which was surprisingly easy.
>
>	Checking, you are running IPv4-only kernel.  In that case,
>	comment out line like below:
>>>O DaemonPortOptions=Family=inet6, address=::, Name=MTA6
>
>	Can't we assume GENERIC kernel for default configuration files?

Errr, no, we must *not* assume Ipv6. Default configuration files must
continue to work on IPv4-only systems.

Either that, or you convince everyone to build both IPv6-infected and
IPV4-only userland distributions, plus suitable config files..