E-Mail an Domain ohne MX

[Jürgen Gmach]

Hi,

eine Kollegin hatte vor Tagen eine E-Mail an basf.de geschrieben, die 
erst nach drei Tagen mit folgender Meldung zurückkam:

Diagnostic-Code: X-Postfix; connect to basf.de[141.6.7.15]:25: 
Connection timed out

dig basf.de MX zeigt mir, dass basf.de gar keinen MX konfiguriert hat.

Was kann der Grund sein, dass unser Postfix erst nach drei Tagen einen 
Timeout liefert? Und nicht sofort einen Fehler meldet?

postconf -n ist im Anhang

Viele Grüße,
-- 
Jürgen Gmach . juergen.gmach at apis.de . +49 9482 941545
APIS Informationstechnologien GmbH . https://www.apis.de
Gewerbepark A 13, 93086 Wörth/Donau . Deutschland
Sitz der GmbH: Wörth/Donau, Amtsgericht Regensburg (HRB 6684)
Geschäftsführer: Julia Anna Dietz, Jürgen Eilers, Peter Rosenbeck
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address_verify_map = btree:/var/spool/postfix/data/verify
alias_database = btree:/etc/mail/local-aliases, btree:/etc/mail/aliases
alias_maps = $alias_database
bounce_queue_lifetime = 1d
bounce_template_file = /etc/postfix/bounce.cf
broken_sasl_auth_clients = yes
canonical_classes = envelope_sender, envelope_recipient
canonical_maps = btree:/etc/mail/canonical, btree:/etc/mail/canonical-template, pcre:/etc/mail/canonical.pcre
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
debug_peer_level = 2
debugger_command = PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin ddd $daemon_directory/$process_name $process_id & sleep 5
delay_warning_time = 4h
home_mailbox = .maildir/
html_directory = no
in_flow_delay = 1s
inet_interfaces = $myhostname, localhost, bliss01.gocept.net
inet_protocols = all
lmtp_connect_timeout = 10m
local_header_rewrite_clients = permit_inet_interfaces, permit_sasl_authenticated, permit_mynetworks
mail_owner = postfix
mailbox_command = procmail -f "$SENDER" -a "$EXTENSION" -d "$USER"
mailbox_size_limit = $message_size_limit
mailman_destination_recipient_limit = 1
mailq_path = /usr/bin/mailq
manpage_directory = /usr/share/man
maximal_queue_lifetime = 3d
message_size_limit = 102400000
mydestination = $myhostname, localhost.$mydomain, localhost, bliss01.gocept.net, bliss01
myhostname = mail.apis.de
mynetworks = /etc/mail/mynetworks, btree:/etc/mail/external-networks
newaliases_path = /usr/bin/newaliases
notify_classes = software, 2bounce, resource
queue_directory = /var/spool/postfix
rbl_reply_maps = btree:/etc/mail/rbl-reply
readme_directory = no
recipient_delimiter = +
relay_domains = /etc/mail/relay-domains
sample_directory = /etc/postfix
sendmail_path = /usr/sbin/sendmail
setgid_group = postdrop
smtp_bind_address = 195.62.126.104
smtp_bind_address6 = 2a02:248:101:62::10d9
smtp_connect_timeout = 3m
smtp_defer_if_no_mx_address_found = yes
smtp_host_lookup = dns, native
smtp_sasl_security_options = noanonymous, noplaintext
smtp_sasl_tls_security_options = noanonymous
smtpd_client_connection_count_limit = 7
smtpd_client_connection_rate_limit = ${stress?10}${stress:100}
smtpd_client_message_rate_limit = ${stress?100}${stress:1000}
smtpd_data_restrictions = reject_unauth_pipelining
smtpd_hard_error_limit = ${stress?4}${stress:20}
smtpd_helo_required = yes
smtpd_junk_command_limit = ${stress?5}${stress:100}
smtpd_policy_service_max_idle = 60s
smtpd_policy_service_timeout = 180s
smtpd_proxy_filter = inet:localhost:10024
smtpd_proxy_timeout = 10m
smtpd_recipient_restrictions = check_client_access btree:/etc/mail/access-client, check_helo_access btree:/etc/mail/access-helo, check_sender_access btree:/etc/mail/access-sender, check_recipient_access btree:/etc/mail/access-recipient, reject_non_fqdn_sender, reject_non_fqdn_recipient, reject_unknown_sender_domain, reject_unknown_recipient_domain, permit_sasl_authenticated, permit_mynetworks, reject_invalid_helo_hostname, reject_rbl_client zen.spamhaus.org=127.0.0.10, reject_rbl_client zen.spamhaus.org=127.0.0.11, 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:127.0.0.1:10030, reject_unverified_recipient, permit_mx_backup, reject_unauth_destination, permit
smtpd_reject_footer = For assistance, call +49 9482 94 15 0 or write to info at apis.de
smtpd_reject_unlisted_recipient = yes
smtpd_reject_unlisted_sender = no
smtpd_relay_restrictions =
smtpd_sasl_auth_enable = yes
smtpd_sasl_authenticated_header = yes
smtpd_sasl_path = private/auth
smtpd_sasl_security_options = noanonymous
smtpd_sasl_tls_security_options = noanonymous
smtpd_sasl_type = dovecot
smtpd_soft_error_limit = ${stress?2}${stress:10}
smtpd_timeout = ${stress?10s}${stress:120s}
smtpd_tls_cert_file = /srv/bliss/deployment/work/nginxmail/mail.apis.de.crt
smtpd_tls_dh1024_param_file = /etc/ssl/dhparams.pem
smtpd_tls_key_file = /srv/bliss/deployment/work/nginxmail/mail.apis.de.key
smtpd_tls_mandatory_exclude_ciphers = aNULL, eNULL, EXPORT, DES, RC4, MD5, PSK, aECDH, EDH-DSS-DES-CBC3-SHA, EDH-RSA-DES-CDC3-SHA, KRB5-DE5, CBC3-SHA
smtpd_use_tls = yes
strict_rfc821_envelopes = no
transport_maps = btree:/etc/mail/transport
unknown_local_recipient_reject_code = 550
unverified_recipient_reject_code = 550
virtual_alias_maps = btree:/etc/mail/virtual-aliases
virtual_mailbox_domains = mysql:/srv/bliss/deployment/work/postfix/mysql-virtual-mailbox-domains.cf
virtual_mailbox_maps = mysql:/srv/bliss/deployment/work/postfix/mysql-virtual-mailbox-maps.cf
virtual_transport = lmtp:unix:private/dovecot-lmtp