[Postfixbuch-users] Name service error for type=AAAA: Host found but no data record

Helmut Lichtenberg heli at tzv.fal.de
Mo Aug 18 10:05:42 CEST 2014


Hallo,
ich bekomme hin und wieder folgende Fehlermeldung:

<XXX at htw-dresden.de> (expanded from <YYY at tzv.fal.de>): Host or domain
    name not found. Name service error for name=rmx6.rz.htw-dresden.de
    type=AAAA: Host found but no data record of requested type

oder der Auszug aus der Logdatei:

Aug 10 11:54:05 mail postfix/smtp[29709]: warning: no MX host for htw-dresden.de has a valid address record
Aug 10 11:54:05 mail postfix/smtp[29709]: 9C7AB1069651F: to=<XXX at htw-dresden.de>, orig_to=<YYY at tzv.fal.de>, relay=none, delay=0.41, delays=0.26/0/0.15/0, dsn=5.4.4, status=bounced (Host or domain name not found. Name service error for name=rmx6.rz.htw-dresden.de type=AAAA: Host found but no data record of requested type)
Aug 10 11:54:05 mail postfix/cleanup[29708]: 02E6C105BAEC0: message-id=<20140810095405.02E6C105BAEC0 at mail.tzv.fal.de>
Aug 10 11:54:05 mail postfix/bounce[29712]: 9C7AB1069651F: sender non-delivery notification: 02E6C105BAEC0
Aug 10 11:54:05 mail postfix/qmgr[30028]: 02E6C105BAEC0: from=<>, size=3737, nrcpt=2 (queue active)
Aug 10 11:54:05 mail postfix/qmgr[30028]: 9C7AB1069651F: removed


Ich habe gelesen, dies sei ein IPv6-Problem.
root at mail,~: postconf inet_protocols
inet_protocols = all

man 5 postconf schreibt zu inet_protocols:
"When both IPv4 and IPv6 support are enabled, the Postfix SMTP client will
attempt to connect via IPv6 before attempting to use IPv4."

Wo liegt hier der Kern des Problems und warum funktioniert der Fallback auf
IPv4 nicht?

Gruß
Helmut

==============================================================================
PS:
ergänzende Infos:

Postfix 2.9.6-2
Debian Wheezy
Kernel 3.2.0-4-amd64

postconf -n:
==============================================================================
alias_maps = hash:/etc/aliases, hash:/var/lib/mailman/data/aliases
bounce_queue_lifetime = 3d
broken_sasl_auth_clients = yes
canonical_maps = pcre:/etc/postfix/canonical
config_directory = /etc/postfix
delay_warning_time = 4h
fli_only = check_client_access cidr:/etc/postfix/access-fli
inet_interfaces = all
local_header_rewrite_clients = permit_mynetworks, permit_sasl_authenticated, permit_tls_clientcerts
masquerade_domains = tzv.local tzv.fal.de
masquerade_exceptions = root
maximal_queue_lifetime = 3d
message_size_limit = 30000000
mydestination = $myhostname, localhost.$mydomain, localhost
myhostname = mail.tzv.fal.de
mynetworks = 127.0.0.0/8, 10.1.0.0/16, 10.2.0.0/16, 192.108.34.0/24, 192.168.55.0/24
myorigin = $mydomain
relay_domains = hash:/etc/postfix/relay_domains
sender_canonical_maps = pcre:/etc/postfix/canonical-sender
smtp_tls_loglevel = 1
smtp_tls_mandatory_protocols = TLSv1
smtp_tls_protocols = TLSv1
smtp_tls_security_level = may
smtpd_proxy_timeout = 300s
smtpd_recipient_restrictions = check_recipient_access hash:/etc/postfix/access-recipient-rfc, check_client_access cidr:/etc/postfix/access-client, check_helo_access hash:/etc/postfix/access-helo, check_sender_access hash:/etc/postfix/access-sender, check_recipient_access hash:/etc/postfix/access-recipient, reject_unknown_sender_domain, reject_unknown_recipient_domain, reject_non_fqdn_sender, permit_sasl_authenticated, permit_mynetworks, reject_invalid_helo_hostname, reject_non_fqdn_recipient, reject_rbl_client zen.spamhaus.org, reject_rbl_client ix.dnsbl.manitu.net, check_policy_service inet:[127.0.0.1]:12525, check_policy_service inet:[127.0.0.1]:10023, reject_unverified_recipient, reject_unauth_destination, permit
smtpd_restriction_classes = fli_only
smtpd_sasl_auth_enable = yes
smtpd_sasl_path = private/auth
smtpd_sasl_type = dovecot
smtpd_tls_CAfile = /etc/ssl/certs/mail.tzv.fal.de.cacrt
smtpd_tls_auth_only = yes
smtpd_tls_cert_file = /etc/ssl/certs/mail.tzv.fal.de.crt
smtpd_tls_dh1024_param_file = /etc/postfix/dh_1024.pem
smtpd_tls_dh512_param_file = /etc/postfix/dh_512.pem
smtpd_tls_eecdh_grade = strong
smtpd_tls_key_file = /etc/ssl/private/mail.tzv.fal.de.key
smtpd_tls_loglevel = 1
smtpd_tls_received_header = yes
smtpd_tls_security_level = may
soft_bounce = no
tls_preempt_cipherlist = yes
transport_maps = hash:/etc/postfix/transport, $relay_domains
unverified_recipient_reject_code = 577
virtual_alias_domains = hash:/etc/postfix/virtual-domains
virtual_alias_maps = hash:/etc/postfix/virtual, proxy:ldap:/etc/postfix/virtual.ldap, hash:/etc/postfix/virtual-manuell, hash:/etc/postfix/virtual-aliases, pcre:/etc/postfix/virtual-mailman_lists
==============================================================================

master.cf (ohne Kommentare):
==============================================================================
smtp             inet  n  -       -       -       20      smtpd 
	-o smtpd_proxy_filter=127.0.0.1:10024 
	-o smtpd_proxy_options=speed_adjust
127.0.0.1:10025  inet  n  -       -       -       -       smtpd
	-o smtpd_proxy_filter= 
	-o content_filter=
	-o smtpd_authorized_xforward_hosts=127.0.0.0/8
127.0.0.1:10035  inet  n  -       -       -       -       smtpd
	-o smtpd_proxy_filter= 
	-o content_filter=
	-o smtpd_authorized_xforward_hosts=127.0.0.0/8
submission       inet  n  -       -       -       -       smtpd
    -o smtpd_etrn_restrictions=reject
    -o smtpd_client_restrictions=permit_sasl_authenticated,reject
    -o content_filter=smtp-amavis:[127.0.0.1]:10024
pickup    fifo  n       -       -       60      1       pickup
cleanup   unix  n       -       -       -       0       cleanup
qmgr      fifo  n       -       -       300     1       qmgr
tlsmgr    unix  -       -       -       1000?   1       tlsmgr
scache    unix  -       -       -       -       1       scache
discard   unix  -       -       -       -       -       discard
retry     unix  -       -       -       -       -       error
rewrite   unix  -       -       -       -       -       trivial-rewrite
bounce    unix  -       -       -       -       0       bounce
defer     unix  -       -       -       -       0       bounce
trace     unix  -       -       -       -       0       bounce
verify    unix  -       -       n       -       1       verify
flush     unix  n       -       -       1000?   0       flush
proxymap  unix  -       -       n       -       -       proxymap
smtp      unix  -       -       -       -       -       smtp
smtp-amavis      unix  -       -       -       -       6       smtp
	-o smtp_send_xforward_command=yes
	-o smtp_data_done_timeout=600s
relay     unix  -       -       -       -       -       smtp
showq     unix  n       -       -       -       -       showq
error     unix  -       -       -       -       -       error
local     unix  -       n       n       -       -       local
virtual   unix  -       n       n       -       -       virtual
lmtp      unix  -       -       n       -       -       lmtp
anvil     unix  -       -       n       -       1       anvil
maildrop  unix  -       n       n       -       -       pipe
  flags=DRhu user=vmail argv=/usr/local/bin/maildrop -d ${recipient}
uucp      unix  -       n       n       -       -       pipe
  flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)
ifmail    unix  -       n       n       -       -       pipe
  flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
bsmtp     unix  -       n       n       -       -       pipe
  flags=Fq. user=bsmtp argv=/usr/lib/bsmtp/bsmtp -d -t$nexthop -f$sender $recipient
scalemail-backend unix	-	n	n	-	2	pipe
  flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store ${nexthop} ${user} ${extension}
==============================================================================

-- 
-------------------------------------------------------------------------
Helmut Lichtenberg  <Helmut.Lichtenberg at fli.bund.de>  Tel.: 05034/871-128
Institut für Nutztiergenetik (FLI)         31535 Neustadt         Germany
-------------------------------------------------------------------------



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