Ja, halte die installierte Software auf Deinem Server immer aktuell, lass nur die Dienste laufen, die Du wirklich benötigst und konfiguriere sie sicher. Checke alle Scripte, die von außen aufrufbar sind auf die üblichen Schwachpunkte und kontrolliere täglich Deine Logfiles. Lese Sicherheitsmailinglisten.Gibt es dafür ein lösung ?
Jun 11 17:01:54 moonfox postfix/master[22868]: daemon started -- version 2.3.8, configuration /etc/postfix
Jun 11 17:01:54 moonfox postfix/qmgr[22873]: BB6BB29160: from=<[email protected]>, size=671, nrcpt=1 (queue active)
Jun 11 17:01:54 moonfox postfix/trivial-rewrite[22876]: warning: do not list domain moonfox.eu in BOTH mydestination and virtual_mailbox_domains
Jun 11 17:01:54 moonfox postfix/qmgr[22873]: 506C92926D: from=<[email protected]>, size=896, nrcpt=1 (queue active)
Jun 11 17:01:54 moonfox postfix/qmgr[22873]: 7F3DA28265: from=<[email protected]>, size=660, nrcpt=1 (queue active)
Jun 11 17:01:54 moonfox postfix/trivial-rewrite[22876]: warning: do not list domain moonfox.eu in BOTH mydestination and virtual_mailbox_domains
Jun 11 17:01:54 moonfox postfix/qmgr[22873]: 3C4392806A: from=<>, size=2611, nrcpt=1 (queue active)
Jun 11 17:01:54 moonfox postfix/qmgr[22873]: 5EFEF293DF: from=<[email protected]>, size=660, nrcpt=1 (queue active)
Jun 11 17:01:54 moonfox postfix/trivial-rewrite[22876]: warning: do not list domain moonfox.eu in BOTH mydestination and virtual_mailbox_domains
Jun 11 17:01:54 moonfox postfix/local[22878]: fatal: main.cf configuration error: mailbox_size_limit is smaller than message_size_limit
Jun 11 17:01:54 moonfox postfix/qmgr[22873]: 94E51281BB: from=<>, size=2626, nrcpt=1 (queue active)
warning: do not list domain moonfox.eu in BOTH mydestination and virtual_mailbox_domains
Jun 11 17:01:54 moonfox postfix/local[22878]: fatal: main.cf configuration error: mailbox_size_limit is smaller than message_size_limit
# See /usr/share/postfix/main.cf.dist for a commented, more complete version
# Debian specific: Specifying a file name will cause the first
# line of that file to be used as the name. The Debian default
# is /etc/mailname.
#myorigin = /etc/mailname
smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
biff = no
# appending .domain is the MUA's job.
append_dot_mydomain = no
# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h
# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
# information on enabling SSL in the smtp client.
mydomain = moonfox.eu
myhostname = moonfox.eu
myorigin = $mydomain
mydestination = localhost.$mydomain localhost $mydomain
relayhost =
mynetworks = 127.0.0.0/8
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
smtpd_sasl_path = private/auth
smtpd_sasl_type = dovecot
smtpd_sasl_local_domain = $myhostname
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
smtpd_recipient_restrictions = permit_sasl_authenticated, reject_unauth_destination
# TLS parameters
#smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
#smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
#smtpd_use_tls=yes
smtpd_tls_session_cache_database = btree:${queue_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${queue_directory}/smtp_scache
#smtpd_tls_cert_file = /etc/ssl/certs/postfix.pem
#smtpd_tls_key_file = /etc/ssl/private/postfix.pem
virtual_mailbox_domains = mysql:/etc/postfix/mysql-virtual-mailbox-domains.cf
virtual_uid_maps = static:5000
virtual_gid_maps = static:5000
virtual_mailbox_maps = mysql:/etc/postfix/mysql-virtual-mailbox-maps.cf
virtual_alias_maps = mysql:/etc/postfix/mysql-virtual-alias-maps.cf,mysql:/etc/postfix/mysql-email2email.cf
virtual_transport = dovecot
dovecot_destination_recipient_limit = 1