i386/110328: sendmail

[Cristiano Valli]

>Number:         110328
>Category:       i386
>Synopsis:       sendmail
>Confidential:   no
>Severity:       non-critical
>Priority:       high
>Responsible:    freebsd-i386
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Mar 15 09:50:04 GMT 2007
>Closed-Date:
>Last-Modified:
>Originator:     Cristiano Valli
>Release:        6.1-RELEASE-p3
>Organization:
Consortium GARR
>Environment:
FreeBSD cyrus.dir.garr.it 6.1-RELEASE-p3 FreeBSD 6.1-RELEASE-p3 #0: Thu Jul 20 06:47:18 CEST 2006     toor at cyrus.dir.garr.it:/usr/src/sys/i386/compile/CYRUS-SMP  i386
>Description:
cyrus# host -t AAAA xxxx.xxx.xxx
Host xxxx.xxx.xxx not found: 2(SERVFAIL)

the sendmail.cf and submit.cf are configured as suggested into sendmail guide to work around broken AAAA :

O ResolverOptions=WorkAroundBrokenAAAA

the problem persists.
The host's NIC has an IPv6 address and the kernel parameters concerning IPv6 are : 

cyrus# sysctl -a |grep inet6
net.inet6.ip6.forwarding: 0
net.inet6.ip6.redirect: 1
net.inet6.ip6.hlim: 64
net.inet6.ip6.maxfragpackets: 6400
net.inet6.ip6.accept_rtadv: 0
net.inet6.ip6.keepfaith: 0
net.inet6.ip6.log_interval: 5
net.inet6.ip6.hdrnestlimit: 50
net.inet6.ip6.dad_count: 1
net.inet6.ip6.auto_flowlabel: 1
net.inet6.ip6.defmcasthlim: 1
net.inet6.ip6.gifhlim: 30
net.inet6.ip6.kame_version: FreeBSD
net.inet6.ip6.use_deprecated: 1
net.inet6.ip6.rr_prune: 5
net.inet6.ip6.v6only: 1
net.inet6.ip6.rtexpire: 3600
net.inet6.ip6.rtminexpire: 10
net.inet6.ip6.rtmaxcache: 128
net.inet6.ip6.use_tempaddr: 0
net.inet6.ip6.temppltime: 86400
net.inet6.ip6.tempvltime: 604800
net.inet6.ip6.auto_linklocal: 1
net.inet6.ip6.prefer_tempaddr: 0
net.inet6.ip6.use_defaultzone: 0
net.inet6.ip6.maxfrags: 6400
net.inet6.ip6.mcast_pmtu: 0
net.inet6.icmp6.rediraccept: 1
net.inet6.icmp6.redirtimeout: 600
net.inet6.icmp6.nd6_prune: 1
net.inet6.icmp6.nd6_delay: 5
net.inet6.icmp6.nd6_umaxtries: 3
net.inet6.icmp6.nd6_mmaxtries: 3
net.inet6.icmp6.nd6_useloopback: 1
net.inet6.icmp6.nodeinfo: 3
net.inet6.icmp6.errppslimit: 100
net.inet6.icmp6.nd6_maxnudhint: 0
net.inet6.icmp6.nd6_debug: 0
net.inet6.icmp6.nd6_maxqueuelen: 1

I guess someone can help me in some way.
Thanks

>How-To-Repeat:
the problem it's related specifically to that mail domain and to that mail host.
Sendmail operates fine with other domains.
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted: