Hi list,
seit kurzem ist mir aufgefallen dass unser postfix-mail-server 1, der als haupt-mail-server fungiert und die mails nach innen und aussen weiterleitet, die queue mit allerhand mails voll hat. Darunter sind auch mails an verteiler.
Teilweise gibt es timeouts bei der kommunikation mit dem mailserver 2, welcher die postfächer enthält. (postfix, dovecot mit 2000 postfächern)
Postqueue p auf mail server 1 enthält viele Nachrichten einer Aussendung an mehr als 1000 user in der Queue.
Es gibt folgende Meldung:
(conversation with mailserver 2 [ip] timed out while sending RCPT TO)
Diese Mails an die Verteiler stecken seit einigen Tagen in der queue fest.
Was blockiert die Aussendung dieser Verteiler-Mail ?
Vor allem gibt es keine Meldung, dass die Mails verzögert werden oder nicht angekommen sind.
Die log-Dateien geben nichts verdächtiges aus.
Wie gesagt, mails gehen rein und raus, nur bei den mails an die verteiler hakt es ordentlich.
Config n (mailserver 1)
Mailserver 1:/ # postconf -n
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
allow_percent_hack = yes
append_at_myorigin = yes
command_directory = /usr/sbin
config_directory = /etc/postfix
content_filter =
daemon_directory = /usr/lib/postfix
debug_peer_level = 20
default_destination_recipient_limit = 9000
default_extra_recipient_limit = 9000
defer_transports =
disable_dns_lookups = no
empty_address_recipient = MAILER-DAEMON
inet_interfaces = IP
local_recipient_maps = unix:passwd.byname $alias_maps
mail_owner = postfix
mail_spool_directory = /var/mail
mailbox_command =
mailbox_size_limit = 0
mailbox_transport =
mailq_path = /usr/bin/mailq
manpage_directory = /usr/share/man
maps_rbl_domains = pbl.spamhaus.org sbl-xbl.spamhaus.org relays.ordb.org combined.njabl.org
masquerade_classes = envelope_sender, header_sender, header_recipient
masquerade_domains = domain.de
masquerade_exceptions = root
mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain, domain-2.de
mydomain = domain.de
myhostname = server.domain.de
mynetworks = IP
myorigin = $mydomain
newaliases_path = /usr/bin/newaliases
queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/postfix/README_Debian
relay_domains = $mydestination
relayhost =
sendmail_path = /usr/sbin/sendmail
setgid_group = postdrop
smtp_sasl_auth_enable = no
smtp_use_tls = no
smtpd_client_restrictions = reject_rbl_client sbl-xbl.spamhaus.org reject_rbl_client cbl.abuseat.org
smtpd_helo_required = yes
smtpd_helo_restrictions =
smtpd_recipient_limit = 9000
smtpd_recipient_restrictions = permit_mynetworks,reject_unauth_destination
smtpd_sasl_auth_enable = no
smtpd_use_tls = no
strict_rfc821_envelopes = no
swap_bangpath = yes
unknown_local_recipient_reject_code = 450
virtual_alias_domains = virtual-domain.de
virtual_alias_maps = hash:/etc/postfix/virtual
postconf n (mailserver 2)
mailserver 2:~# postconf -n
alias_maps = hash:/etc/aliases
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/lib/postfix
default_destination_recipient_limit = 9000
default_extra_recipient_limit = 9000
home_mailbox = Maildir/
html_directory = /usr/share/doc/postfix/html
inet_interfaces = IP
mail_owner = postfix
mailq_path = /usr/bin/mailq
manpage_directory = /usr/share/man
message_size_limit = 30960000
mydestination = $myhostname, localhost.$mydomain, localhost
mydomain = mailserver 2.domain.de
myhostname = mailserver 2.domain.de
mynetworks = IPs
myorigin = $mydomain
newaliases_path = /usr/bin/newaliases
queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/postfix
relay_domains = $mydestination
sample_directory = /usr/share/postfix
sendmail_path = /usr/sbin/sendmail
setgid_group = postdrop
smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
smtpd_recipient_limit = 9000
unknown_local_recipient_reject_code = 550