[Postfixbuch-users] Double-Bounce Verständnisfrage

[Alois Kratochwill]

Hallo ans Team!

Ich stehe hier mächtig auf einer Postfix-Leitung (2.3)!

Im mail.log sind mir <double-bounce> Einträge aufgefallen, die ich mir nicht
erklären kann. Im folgenden Auszug wird im ersten Beispiel ein 450 gesendet
(postfix-policyd -> smtpd_proxy_filter), anschließend der <double-bounce>
abgesetzt. Ca. 7 Minuten später wird die die Nachricht erneut eingeliefert. Mit
Erfolg. Warum die Double-Bounce Meldung?  

1. ---
Aug 10 14:33:39 mail01 postfix/smtpd[22713]: connect from
c3.aboliton.at[193.200.113.22]
Aug 10 14:33:40 mail01 postfix/smtpd[22713]: NOQUEUE: reject: RCPT from
c3.aboliton.at[193.200.113.22]: 450 4.7.1 <ein.kunde at abcd.at>: Recipient address
rejected: Policy Rejection- Please try later.;
from=<balanceaktuell at balanceakademie.at> to=<ein.kunde at abcd.at> proto=ESMTP
helo=<c3.aboliton.at>
Aug 10 14:33:40 mail01 postfix/cleanup[22794]: 3CA2C227406D:
message-id=<20100810123340.3CA2C227406D at mail01.wdns.at>
Aug 10 14:33:40 mail01 postfix/smtpd[22713]: disconnect from
c3.aboliton.at[193.200.113.22]
Aug 10 14:33:40 mail01 postfix/qmgr[15634]: 3CA2C227406D:
from=<double-bounce at mail01.wdns.at>, size=275, nrcpt=1 (queue active)
Aug 10 14:33:40 mail01 postfix/pipe[22795]: 3CA2C227406D:
to=<ein.kunde at abcd.at>, relay=dovecot, delay=0.05, delays=0.04/0.01/0/0,
dsn=2.0.0, status=deliverable (delivers to command: /usr/lib/dovecot/deliver)
Aug 10 14:33:40 mail01 postfix/qmgr[15634]: 3CA2C227406D: removed

Aug 10 14:40:19 mail01 postfix/smtpd[22854]: connect from
c3.aboliton.at[193.200.113.22]
Aug 10 14:40:19 mail01 postfix/smtpd[22854]: NOQUEUE:
client=c3.aboliton.at[193.200.113.22]
Aug 10 14:40:20 mail01 postfix/smtpd[22862]: connect from
localhost.localdomain[127.0.0.1]
Aug 10 14:40:20 mail01 postfix/smtpd[22862]: 8DDA0227406D:
client=c3.aboliton.at[193.200.113.22]
Aug 10 14:40:20 mail01 postfix/cleanup[22863]: 8DDA0227406D:
message-id=<20100810143735F5B73CB99F$45E9B339D4 at BUNDY>
Aug 10 14:40:20 mail01 postfix/qmgr[15634]: 8DDA0227406D:
from=<balanceaktuell at balanceakademie.at>, size=123000, nrcpt=1 (queue active)
Aug 10 14:40:20 mail01 postfix/smtpd[22862]: disconnect from
localhost.localdomain[127.0.0.1]
Aug 10 14:40:20 mail01 amavis[20501]: (20501-07) Passed CLEAN, LOCAL
[193.200.113.22] [85.126.115.73] <balanceaktuell at balanceakademie.at> ->
<ein.kunde at abcd.at>, Message-ID: <20100810143735F5B73CB99F$45E9B339D4 at BUNDY>,
mail_id: VtanaIFvShZY, Hits: 0.001, size: 122357, queued_as: 8DDA0227406D, 922
ms
Aug 10 14:40:20 mail01 postfix/smtpd[22854]: disconnect from
c3.aboliton.at[193.200.113.22]
Aug 10 14:40:20 mail01 postfix/pipe[22866]: 8DDA0227406D:
to=<ein.kunde at abcd.at>, relay=dovecot, delay=0.18, delays=0.07/0.01/0/0.11,
dsn=2.0.0, status=sent (delivered via dovecot service)
Aug 10 14:40:20 mail01 postfix/qmgr[15634]: 8DDA0227406D: removed
---

Zweites Beispiel ohne einen 450er:

2. ---
Aug 10 16:10:10 mail01 postfix/smtpd[23808]: connect from
mail17-58.srv2.de[193.169.180.58]
Aug 10 16:10:11 mail01 postfix/smtpd[23808]: NOQUEUE:
client=mail17-58.srv2.de[193.169.180.58]
Aug 10 16:10:11 mail01 postfix/cleanup[23866]: 27A2D227406D:
message-id=<20100810141011.27A2D227406D at mail01.wdns.at>
Aug 10 16:10:11 mail01 postfix/qmgr[15634]: 27A2D227406D:
from=<double-bounce at mail01.wdns.at>, size=275, nrcpt=1 (queue active)
Aug 10 16:10:11 mail01 postfix/pipe[23867]: 27A2D227406D:
to=<eine.kundin at efdgh.at>, relay=dovecot, delay=0.08, delays=0.07/0.01/0/0,
dsn=2.0.0, status=deliverable (delivers to command: /usr/lib/dovecot/deliver)
Aug 10 16:10:11 mail01 postfix/qmgr[15634]: 27A2D227406D: removed

Aug 10 16:10:14 mail01 postfix/smtpd[23870]: connect from
localhost.localdomain[127.0.0.1]
Aug 10 16:10:14 mail01 postfix/smtpd[23870]: 5B61F227406D:
client=mail17-58.srv2.de[193.169.180.58]
Aug 10 16:10:14 mail01 postfix/cleanup[23866]: 5B61F227406D:
message-id=<re-pLj5OKHxfQExppvufj4_5FG3CkyZpEvn1qCb7fgD-BGG3RD0-1USFLXH-W5K19A3@
produktnews.thalia.at>
Aug 10 16:10:14 mail01 postfix/qmgr[15634]: 5B61F227406D:
from=<return at produktnews.thalia.at>, size=97057, nrcpt=1 (queue active)
Aug 10 16:10:14 mail01 postfix/smtpd[23870]: disconnect from
localhost.localdomain[127.0.0.1]
Aug 10 16:10:14 mail01 amavis[20501]: (20501-13) Passed CLEAN, LOCAL
[193.169.180.58] [193.169.180.58] <return at produktnews.thalia.at> ->
<eine.kundin at efdgh.at>, Message-ID:
<re-pLj5OKHxfQExppvufj4_5FG3CkyZpEvn1qCb7fgD-BGG3RD0-1USFLXH-W5K19A3 at produktnews
.thalia.at>, mail_id: xjO-69Rkvpoy, Hits: 0, size: 96389, queued_as:
5B61F227406D, 3309 ms
Aug 10 16:10:14 mail01 postfix/pipe[23867]: 5B61F227406D:
to=<eine.kundin at efdgh.at>, relay=dovecot, delay=0.19, delays=0.07/0/0/0.12,
dsn=2.0.0, status=sent (delivered via dovecot service)
Aug 10 16:10:14 mail01 postfix/qmgr[15634]: 5B61F227406D: removed
---

Dieser Effekt tritt anscheinend nur bei Mails von Verteilerlisten auf.
Hat jemand einen Rat für mich?

Danke Alois


postconf -n:
---
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
bounce_queue_lifetime = 1d
bounce_template_file = /etc/postfix/bounce.cf
broken_sasl_auth_clients = yes
config_directory = /etc/postfix
delay_warning_time = 0h
disable_vrfy_command = yes
header_checks = pcre:/etc/postfix/header_checks.pcre
inet_interfaces = all
mail_name = WDNS-eMail-Service
mail_version = 2.5
mailbox_command = /usr/lib/dovecot/deliver
mailbox_size_limit = 104857600
maximal_backoff_time = 4000s
maximal_queue_lifetime = 1d
message_size_limit = 34865152
minimal_backoff_time = 300s
mydestination = $myhostname, localhost, localhost.localdomain,
localhost.$mydomain
mydomain = wdns.at
myhostname = mail01.wdns.at
mynetworks = 127.0.0.0/8
mynetworks_style = subnet
myorigin = mail01.wdns.at
queue_run_delay = 300s
readme_directory = no
receive_override_options = no_address_mappings
recipient_bcc_maps =
proxy:mysql:/etc/postfix/mysql_recipient_bcc_maps_domain.cf,proxy:mysql:/etc/pos
tfix/mysql_recipient_bcc_maps_user.cf
recipient_delimiter = +
relay_domains = proxy:mysql:/etc/postfix/mysql_relay_domains.cf
relay_recipient_maps = proxy:mysql:/etc/postfix/mysql_virtual_mailbox_maps.cf
relayhost =
sender_bcc_maps =
proxy:mysql:/etc/postfix/mysql_sender_bcc_maps_domain.cf,proxy:mysql:/etc/postfi
x/mysql_sender_bcc_maps_user.cf
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
smtpd_data_restrictions = reject_unauth_pipelining
smtpd_enforce_tls = no
smtpd_helo_required = yes
smtpd_proxy_filter = 127.0.0.1:10024
smtpd_recipient_restrictions = reject_non_fqdn_sender,
reject_non_fqdn_recipient,      reject_invalid_helo_hostname,
reject_unknown_sender_domain,    reject_unknown_recipient_domain,
reject_unlisted_recipient,       reject_sender_login_mismatch,
permit_sasl_authenticated,   permit_mynetworks,       reject_unauth_destination,
check_helo_access pcre:/etc/postfix/helo_access.pcre,
reject_unauth_pipelining,       check_policy_service inet:127.0.0.1:10031,
reject_rbl_client ix.dnsbl.manitu.net,       reject_rbl_client zen.spamhaus.org,
reject_unverified_recipient,        permit
smtpd_reject_unlisted_recipient = yes
smtpd_reject_unlisted_sender = yes
smtpd_sasl_auth_enable = yes
smtpd_sasl_authenticated_header = yes
smtpd_sasl_local_domain =
smtpd_sasl_path = private/auth
smtpd_sasl_security_options = noanonymous
smtpd_sasl_type = dovecot
smtpd_sender_login_maps = mysql:/etc/postfix/mysql_sender_login_maps.cf
smtpd_tls_auth_only = no
smtpd_tls_cert_file = /etc/ssl/certs/postfix.pem
smtpd_tls_key_file = /etc/ssl/private/postfix.pem
smtpd_tls_loglevel = 0
smtpd_tls_security_level = may
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_use_tls = yes
soft_bounce = no
tls_random_source = dev:/dev/urandom
transport_maps = proxy:mysql:/etc/postfix/mysql_transport_maps_user.cf,
proxy:mysql:/etc/postfix/mysql_transport_maps_domain.cf
unknown_address_reject_code = 550
unknown_client_reject_code = 550
unknown_hostname_reject_code = 550
unknown_local_recipient_reject_code = 550
unknown_relay_recipient_reject_code = 550
unknown_virtual_alias_reject_code = 550
unknown_virtual_mailbox_reject_code = 550
unverified_recipient_reject_code = 577
unverified_sender_reject_code = 577
virtual_alias_maps = proxy:mysql:/etc/postfix/mysql_virtual_alias_maps.cf,
proxy:mysql:/etc/postfix/mysql_virtual_mailbox_maps.cf
virtual_gid_maps = static:5000
virtual_mailbox_domains =
proxy:mysql:/etc/postfix/mysql_virtual_mailbox_domains.cf
virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql_virtual_mailbox_maps.cf
virtual_minimum_uid = 5000
virtual_transport = dovecot
virtual_uid_maps = static:5000