[Postfixbuch-users] "refused to talk" wird zu "mail transport unavailable" ?

[Christian Wittwer]

Hallo,
Ich habe aktuell ein Setup mit 2 Postfix-Instanzen.
Eine Instanz postfix-ram (Queue in einer Ramdisk) die als
smtp_fallback_relay auf die Instanz postfix zeigt (die originale
Instanz, lauscht nur auf localhost).
Aktuell macht mir ein Provider Probleme, und weisst Mails ab mit einem
421. Die Mails gehen von postfix-ram nach postfix.
Dieser versucht es nochmals, es klappt aber immer noch nicht.

Sep 17 12:10:28 rata postfix/smtp[3738]: DFE8F4761E: to=<bla at hot.ee>,
relay=mail.hot.ee[194.126.101.116]:25, delay=958, delays=956/2/0.09/0,
dsn=4.7.0, status=deferred (host mail.hot.ee[194.126.101.116] refused
to talk to me: 421 4.7.0 Relayhost1.neti.ee Error: too many
connections from xx.xx.xx.xx)

Anschliessend taucht diese Meldung auf.

Sep 17 12:10:28 rata postfix/qmgr[2088]: warning: connect to transport
private/retry: Connection refused
Sep 17 12:10:28 rata postfix/qmgr[2088]: warning: connect to transport
private/retry: Connection refused
Sep 17 12:10:28 rata postfix/qmgr[2088]: D272A47706: to=<bla at hot.ee>,
relay=none, delay=916, delays=914/2.1/0/0, dsn=4.3.0, status=deferred
(mail transport unavailable)

Die Meldungen verwirren mich irgendwie. Weil einige Mails konnten auch
schon zugestellt werden.
Kann da jemand Lichts ins Dunkle bringen?

postfix
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
debug_peer_level = 2
html_directory = /usr/share/doc/postfix-2.6.1-documentation/html
inet_interfaces = 127.0.0.1
mail_owner = postfix
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
multi_instance_directories = /etc/postfix-ram
multi_instance_enable = yes
multi_instance_wrapper = ${command_directory}/postmulti -p --
mydestination = $myhostname
mydomain = example.com
myhostname = smtp3f.example.com
mynetworks = 127.0.0.0/8
myorigin = $mydomain
newaliases_path = /usr/bin/newaliases.postfix
queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/postfix-2.6.1-documentation/readme
sample_directory = /etc/postfix
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtp_connect_timeout = 30s
smtp_data_done_timeout = 60s
smtp_data_init_timeout = 15s
smtp_data_xfer_timeout = 20s
smtp_helo_timeout = 30s
smtp_mail_timeout = 30s
smtp_quit_timeout = 30s
smtp_rcpt_timeout = 30s
smtp_rset_timeout = 10s
smtp_starttls_timeout = 30s
transport_maps = hash:/etc/postfix/transport

postfix-ram
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
authorized_submit_users =
command_directory = /usr/sbin
config_directory = /etc/postfix-ram
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix-ram
debug_peer_level = 2
html_directory = /usr/share/doc/postfix-2.6.1-documentation/html
inet_interfaces = xxx.xxx.xxx.xxx, 192.168.1.198
mail_owner = postfix
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
master_service_disable =
multi_instance_enable = yes
multi_instance_name = postfix-ram
mydestination = $myhostname
mydomain = example.com
myhostname = smtp3.example.com
mynetworks = 192.168.1.0/24, etc...
myorigin = $mydomain
newaliases_path = /usr/bin/newaliases.postfix
queue_directory = /var/spool/postfix-ram
readme_directory = /usr/share/doc/postfix-2.6.1-documentation/readme
sample_directory = /etc/postfix
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtp_connect_timeout = 1s
smtp_data_done_timeout = 6s
smtp_data_init_timeout = 1s
smtp_data_xfer_timeout = 2s
smtp_fallback_relay = 127.0.0.1
smtp_helo_timeout = 3s
smtp_mail_timeout = 3s
smtp_quit_timeout = 3s
smtp_rcpt_timeout = 3s
smtp_rset_timeout = 1s
smtp_starttls_timeout = 3s
transport_maps = hash:/etc/postfix-ram/transport