I am using a stock Sendmail 8.13 on Solaris 9 which was compiled with
IPv6 support.

I am trying to disable the AAAA (IPv6) DNS queries on inbound
messages.

I have disabled sendmail from running in IPv6 modue using the
DaemonPortOptions
confirmed by netstat -anf inet6

I have disabled IPv6 in Resolver by -use_inet6

Neither of these prevent the AAAA queries

I have found several apparently related threads:

http://groups.google.com/group/comp....107dfa280f716c

http://groups.google.com/group/comp....2c9af08d016ef2

http://groups.google.com/group/comp....b4194bea2bcb85

Basically, the three pieces of advice given are:
1. Disable using DaemonPort Options
2. Disable using Resolver Options
3. Recompile

I have tried 1 and 2 to no avail and do not want to have to recompile
if at all possible.

Does anyone have any ideas?

Cheers,
Joshua Gatcomb
a.k.a. Limbic_Region

In article <1177607242.148087.147860@t39g2000prd.googlegroups .com>
Limbic_Region <joshua.gatcomb@gmail.com> writes:
>I am using a stock Sendmail 8.13 on Solaris 9 which was compiled with
>IPv6 support.
>
>I am trying to disable the AAAA (IPv6) DNS queries on inbound
>messages.
>
>I have disabled sendmail from running in IPv6 modue using the
>DaemonPortOptions
>confirmed by netstat -anf inet6

Per the sendmail documentaion (and your observation), this controls what
addresses the daemon listens on - it should be (and is) independent of
DNS queries made.

>I have disabled IPv6 in Resolver by -use_inet6

Per the resolver documentation on my OS (FreeBSD), this option is off by
default, and if on will map IPv4 addresses into IPv6 - not relevant for
which queries are made.

>Basically, the three pieces of advice given are:
>1. Disable using DaemonPort Options
>2. Disable using Resolver Options
>3. Recompile
>
>I have tried 1 and 2 to no avail and do not want to have to recompile
>if at all possible.

It will work though.:-)

>Does anyone have any ideas?

The only runtime condition for doing AAAA lookups is that the kernel
actually supports IPv6, determined by (in conf.c):

/* Detect if IPv6 is available at run time */
i = socket(AF_INET6, SOCK_STREAM, 0);
if (i >= 0)
{
InetMode = AF_INET6;
(void) close(i);
}
else
InetMode = AF_INET;

Maybe your OS supports disabling IPv6 dynamically, or you could rebuild
its kernel instead of rebuilding sendmail if you prefer that...

--Per Hedeland
per@hedeland.org