Hello,
A hacker was able to use the server to spam pc. It is installed in version 1.2.1 imscp.
OVH has blocked port 25.
I changed the master.cf and main.cf files as I could.
Since all mail transfer type are blocked.
The error message in the postqueue is: (temporary failure. Command output: /usr/bin/maildrop: Unable to create a dot-lock at domaine.com/dossier/30998.0.ns370186.
main.cf
QuoteDisplay More# Some common configuration parameters
inet_protocols = ipv4
inet_interfaces = all
mynetworks_style = host
# IPv4 source for outbound mails
smtp_bind_address = 00.00.00.00
# IPv6 source for outbound mails
#smtp_bind_address6 =
myhostname = ns370186.ip-00-00-00.eu
mydomain = ns370186.ip-00-00-00.eu.local
myorigin = $myhostname
smtpd_banner = $myhostname ESMTP i-MSCP 1.2.1 Managed
debug_peer_list = 127.0.0.1
# Receiving messages parameters
mydestination = $myhostname, $mydomain
append_dot_mydomain = no
append_at_myorigin = yes
local_transport = local
transport_maps = hash:/etc/postfix/imscp/transport
relay_domains = hash:/etc/postfix/imscp/relay_domains
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
# Delivering local messages parameters
mail_spool_directory = /var/mail
# Mailboxquota
# => 0 for unlimited
# => 104857600 for 100 MB
mailbox_size_limit = 0
mailbox_command = procmail -a "$EXTENSION"
# Message size limit
# => 0 for unlimited
# => 104857600 for 100 MB
message_size_limit = 0
biff = no
recipient_delimiter = +
local_destination_recipient_limit = 1
local_recipient_maps = unix:passwd.byname $alias_database
# i-MSCP Autoresponder parameters
imscp-arpl_destination_recipient_limit = 1
# Delivering virtual messages parameters
virtual_mailbox_base = /var/mail/virtual
virtual_mailbox_limit = 0
virtual_mailbox_domains = hash:/etc/postfix/imscp/domains
virtual_mailbox_maps = hash:/etc/postfix/imscp/mailboxes
virtual_alias_maps = hash:/etc/postfix/imscp/aliases
virtual_minimum_uid = 999
virtual_uid_maps = static:999
virtual_gid_maps = static:8
# SASL parameters
smtpd_sasl_type = cyrus
smtpd_sasl_path = smtpd
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
broken_sasl_auth_clients = yes
smtpd_sasl_authenticated_header = yes
smtpd_helo_required = yes
smtpd_reject_unlisted_sender = yes
smtpd_client_restrictions = permit_mynetworks,
reject_invalid_hostname,
reject_rbl_client zen.spamhaus.org,
reject_rbl_client tw.yahoo.com,
reject_rbl_client yahoo.com.tw,
reject_rbl_client hinet.net ,
reject_rbl_client msa.hinet.net ,
reject_unknown_client,
permit
smtpd_helo_restrictions = permit_mynetworks,
permit_sasl_authenticated,
reject_invalid_helo_hostname,
reject_non_fqdn_helo_hostname,
reject_invalid_hostname,
reject_rbl_client zen.spamhaus.org,
reject_rbl_client tw.yahoo.com,
reject_rbl_client yahoo.com.tw,
reject_rbl_client hinet.net,
reject_rbl_client msa.hinet.net,
reject_unknown_client,
permit
smtpd_sender_restrictions = permit_mynetworks,
reject_non_fqdn_sender,
reject_unknown_sender_domain,
permit_sasl_authenticated,
reject_unknown_address
smtpd_relay_restrictions =
smtpd_recipient_restrictions = permit_mynetworks,
permit_sasl_authenticated,
reject_unauth_destination,
reject_non_fqdn_recipient,
reject_non_fqdn_sender,
reject_invalid_helo_hostname,
reject_unlisted_recipient,
reject_non_fqdn_helo_hostname,
reject_unknown_recipient_domain,
reject_rbl_client zen.spamhaus.org,
reject_rbl_client bl.spamcop.net,
check_policy_service inet:127.0.0.1:10023,
reject_invalid_hostname,
permit
smtpd_data_restrictions = reject_multi_recipient_bounce,
reject_unauth_pipelining,
permit
# TLS parameters
#smtpd_tls_security_level = may
#smtpd_tls_mandatory_protocols = !SSLv2, !SSLv3
#smtpd_tls_protocols = !SSLv2, !SSLv3
#smtpd_tls_loglevel = 0
#smtpd_tls_cert_file = /etc/imscp/imscp_services.pem
#smtpd_tls_key_file = /etc/imscp/imscp_services.pem
#smtpd_tls_auth_only = no
#smtpd_tls_received_header = yes
#smtp_tls_security_level = may
#smtp_tls_mandatory_protocols = !SSLv2, !SSLv3
#smtp_tls_protocols = !SSLv2, !SSLv3
#smtp_tls_loglevel = 0
#smtp_tls_CAfile = /etc/ssl/certs/ca-certificates.crt
virtual_transport = maildrop
maildrop_destination_concurrency_limit = 2
maildrop_destination_recipient_limit = 1
#content_filter = smtp-amavis:[127.0.0.1]:10024
#receive_override_options = no_address_mappings
master.cf
QuoteDisplay More# Postfix master process configuration file. For details on the format
# of the file, see the master(5) manual page (command: "man 5 master").
#
# Do not forget to execute "postfix reload" after editing this file.
#
# ==========================================================================
# service type private unpriv chroot wakeup maxproc command + args
# (yes) (yes) (yes) (never) (100)
# ==========================================================================
smtp inet n - - - - smtpd
submission inet n - - - - smtpd
# -o smtpd_tls_security_level=encrypt
-o smtpd_sasl_auth_enable=yes
-o smtpd_client_restrictions=permit_sasl_authenticated,reject
# -o milter_macro_daemon_name=ORIGINATING
#
smtps inet n - - - - smtpd
-o smtpd_tls_wrappermode=yes
-o smtpd_sasl_auth_enable=yes
-o smtpd_client_restrictions=permit_sasl_authenticated,reject
# -o milter_macro_daemon_name=ORIGINATING
#628 inet n - - - - qmqpd
pickup fifo n - - 60 1 pickup
cleanup unix n - - - 0 cleanup
qmgr fifo n - n 300 1 qmgr
#qmgr fifo n - - 300 1 oqmgr
tlsmgr unix - - - 1000? 1 tlsmgr
rewrite unix - - - - - trivial-rewrite
bounce unix - - - - 0 bounce
defer unix - - - - 0 bounce
trace unix - - - - 0 bounce
verify unix - - - - 1 verify
flush unix n - - 1000? 0 flush
proxymap unix - - n - - proxymap
proxywrite unix - - n - 1 proxymap
smtp unix - - - - - smtp
# When relaying mail as backup MX, disable fallback_relay to avoid MX loops
relay unix - - - - - smtp -v
-o smtp_fallback_relay=
# -o smtp_helo_timeout=5 -o smtp_connect_timeout=5
showq unix n - - - - showq
error unix - - - - - error
retry unix - - - - - error
discard unix - - - - - discard
local unix - n n - - local
virtual unix - n n - - virtual
lmtp unix - - - - - lmtp
anvil unix - - - - 1 anvil
scache unix - - - - 1 scache
#
# ====================================================================
# Interfaces to non-Postfix software. Be sure to examine the manual
# pages of the non-Postfix software to find out what options it wants.
#
# Many of the following services use the Postfix pipe(8) delivery
# agent. See the pipe(8) man page for information about ${recipient}
# and other message envelope options.
# ====================================================================
#
# See the Postfix UUCP_README file for configuration details.
#
uucp unix - n n - - pipe
flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)
#
# Other external delivery methods.
#
ifmail unix - n n - - pipe
flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
bsmtp unix - n n - - pipe
flags=Fq. user=bsmtp argv=/usr/lib/bsmtp/bsmtp -t$nexthop -f$sender $recipient
scalemail-backend unix - n n - 2 pipe
flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store ${nexthop} ${user} ${extension}
mailman unix - n n - - pipe
flags=FR user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py ${nexthop} ${user}
# i-MSCP autoresponder
imscp-arpl unix - n n - - pipe
flags=O user=vmail:imscp argv=/var/www/imscp/engine/messenger/imscp-arpl-msgr $recipient
maildrop unix - n n - - pipe
flags=DRhu user=vmail:mail argv=/usr/bin/maildrop -w 90 -d ${user}@${nexthop} ${extension} ${recipient}
${user} ${nexthop} ${sender}
I ask for a little help.