Sentora Support Forums

Hi I am listed on 2 blacklists as showed below the text here, but how do I set it up so its more secure against email spam?

And I edit out the ips and the domain.

[Image: sJ6gyFh.png]

My dovecot config:

Code:
##
## Dovecot config file
##
listen = *
disable_plaintext_auth = no
log_timestamp = %Y-%m-%d %H:%M:%S 
#log_timestamp was present only in Ubuntu file

# SSL configuration - Begin
ssl = yes
ssl_cert = </etc/letsencrypt/live/mail.mydomain.dk/fullchain.pem
ssl_key = </etc/letsencrypt/live/mail.mydomain.dk/privkey.pem
# Disable SSLV3 - Poodle
ssl_protocols = !SSLv2 !SSLv3
# SSL configuration - End

protocols = imap pop3 lmtp sieve
auth_mechanisms = plain login
passdb {
  driver = sql
  args = /etc/sentora/configs/dovecot2/dovecot-mysql.conf
}
userdb {
  driver = prefetch
}
userdb {
  driver = sql
  args = /etc/sentora/configs/dovecot2/dovecot-mysql.conf
}
mail_location = maildir:/var/sentora/vmail/%d/%n
first_valid_uid = 999
last_valid_uid = 999

first_valid_gid = 8
last_valid_gid = 8
#mail_plugins =
mailbox_idle_check_interval = 30 secs
maildir_copy_with_hardlinks = yes
service imap-login {
  inet_listener imap {
    port = 143
  }
}
service pop3-login {
  inet_listener pop3 {
    port = 110
  }
}
service lmtp {
  unix_listener lmtp {
    #mode = 0666
  }
}
service imap {
  vsz_limit = 256M
}
service pop3 {
}
service auth {
  unix_listener auth-userdb {
    mode = 0666
    user = vmail
    group = mail
  }

  # Postfix smtp-auth
  unix_listener /var/spool/postfix/private/auth {
    mode = 0666
    user = postfix
    group = postfix
  }
}

service auth-worker {
}
service dict {
  unix_listener dict {
    mode = 0666
    user = vmail
    group = mail
  }
}
service managesieve-login {
  inet_listener sieve {
    port = 4190
  }
  service_count = 1
  process_min_avail = 0
  vsz_limit = 64M
}
service managesieve {
}
lda_mailbox_autocreate = yes
lda_mailbox_autosubscribe = yes
protocol lda {
  mail_plugins = quota sieve
  postmaster_address = postmaster@mydomain.dk
}
protocol imap {
  mail_plugins = quota imap_quota trash
  imap_client_workarounds = delay-newmail
}
lmtp_save_to_detail_mailbox = yes

protocol lmtp {
  mail_plugins = quota sieve
}
protocol pop3 {
  mail_plugins = quota
  pop3_client_workarounds = outlook-no-nuls oe-ns-eoh
  pop3_uidl_format = %08Xu%08Xv 
#pop3_uidl_format was present only in ubuntu file
}
protocol sieve {
  managesieve_max_line_length = 65536
  managesieve_implementation_string = Dovecot Pigeonhole
  managesieve_max_compile_errors = 5
}
dict {
  quotadict = mysql:/etc/sentora/configs/dovecot2/dovecot-dict-quota.conf
}
plugin {
# quota = dict:User quota::proxy::quotadict
  quota = maildir:User quota
  acl = vfile:/etc/dovecot/acls
  trash = /etc/sentora/configs/dovecot2/dovecot-trash.conf
  sieve_global_path = /var/sentora/sieve/globalfilter.sieve
  sieve = ~/dovecot.sieve
  sieve_dir = ~/sieve
  sieve_global_dir = /var/sentora/sieve/
  #sieve_extensions = +notify +imapflags
  sieve_max_script_size = 1M
  #sieve_max_actions = 32
  #sieve_max_redirects = 4
}

log_path = /var/log/dovecot.log
info_log_path = /var/log/dovecot-info.log
debug_log_path = /var/log/dovecot-debug.log
mail_debug=yes

# Things Philip Changed for SSL

#auth_mechanisms = plain login
 
# don't allow non-TLS connections for IMAP or SASL
#ssl = required
 
# path to the certificate file, should be root:root and 0444
#ssl_cert = </etc/letsencrypt/live/mail.mydomain.dk/fullchain.pem
 
# path to the private key file, should be root:root and 0400
#ssl_key = </etc/letsencrypt/live/mail.mydomain.dk/privkey.pem

And my postfix condig (main.cf):

Code:
# postfix config file

# uncomment for debugging if needed
soft_bounce=yes

# postfix main
mail_owner = postfix
setgid_group = postdrop
delay_warning_time = 4

# postfix paths
html_directory = no
command_directory = /usr/sbin
daemon_directory = /usr/lib/postfix
queue_directory = /var/spool/postfix
sendmail_path = /usr/sbin/sendmail.postfix
newaliases_path = /usr/bin/newaliases.postfix
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
sample_directory = /usr/share/doc/postfix-2.2.2/samples
readme_directory = /usr/share/doc/postfix-2.2.2/README_FILES

# network settings
inet_interfaces = all
mydomain = mydomain.dk
myhostname = mydomain.dk
mynetworks = 127.0.0.1, myextip
mydestination = localhost.$mydomain, localhost
relay_domains = proxy:mysql:/etc/sentora/configs/postfix/mysql-relay_domains_maps.cf

# mail delivery
recipient_delimiter = +

# mappings
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
#transport_maps = hash:/etc/postfix/transport
#local_recipient_maps =

# virtual setup
virtual_alias_maps = proxy:mysql:/etc/sentora/configs/postfix/mysql-virtual_alias_maps.cf,
                     regexp:/etc/sentora/configs/postfix/virtual_regexp
virtual_mailbox_base = /var/sentora/vmail
virtual_mailbox_domains = proxy:mysql:/etc/sentora/configs/postfix/mysql-virtual_domains_maps.cf
virtual_mailbox_maps = proxy:mysql:/etc/sentora/configs/postfix/mysql-virtual_mailbox_maps.cf
virtual_minimum_uid = 999
virtual_uid_maps = static:999
virtual_gid_maps = static:8
virtual_transport = dovecot
dovecot_destination_recipient_limit = 1

# debugging
debug_peer_level = 2
debugger_command =
         PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
         xxgdb $daemon_directory/$process_name $process_id & sleep 5

# authentication
#smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
smtpd_sasl_local_domain = $myhostname
broken_sasl_auth_clients = yes
#smtpd_sasl_type = dovecot
#smtpd_sasl_path = private/auth

# tls config

smtp_use_tls = yes
smtpd_use_tls = yes
smtpd_tls_security_level = may
smtp_tls_note_starttls_offer = yes
smtpd_tls_loglevel = 1
smtpd_tls_received_header = yes
smtpd_tls_session_cache_timeout = 3600s
tls_random_source = dev:/dev/urandom
smtp_tls_session_cache_database = btree:$data_directory/smtp_tls_session_cache

# path to the certificate file, should be root:root and 0444
smtpd_tls_cert_file=/etc/letsencrypt/live/mail.mydomain.dk/fullchain.pem
 
# path to the private key file, should be root:root and 0400
smtpd_tls_key_file=/etc/letsencrypt/live/mail.mydomain.dk/privkey.pem
 
# Allow use of TLS but make it optional
#smtpd_use_tls=yes
 
# Cache sessions for speed improvement
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
#smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
 
# Disable SSLv2/3 as they are vulnerable
smtpd_tls_protocols = !SSLv2, !SSLv3
 
# Insist on stronger ciphers
smtpd_tls_ciphers = high
 
# SASL parameters
# Don't forget permit_sasl_authenticated in smtpd_relay_restrictions
smtpd_sasl_type = dovecot
smtpd_sasl_path = private/auth
smtpd_sasl_auth_enable = yes

# Jonathan Add
disable_vrfy_command = yes
strict_rfc821_envelopes = yes
invalid_hostname_reject_code = 554
multi_recipient_bounce_reject_code = 554
non_fqdn_reject_code = 554
relay_domains_reject_code = 554
unknown_address_reject_code = 554
unknown_client_reject_code = 554
unknown_hostname_reject_code = 554
unknown_local_recipient_reject_code = 554
unknown_relay_recipient_reject_code = 554
unknown_virtual_alias_reject_code = 554
unknown_virtual_mailbox_reject_code = 554
unverified_recipient_reject_code = 554
unverified_sender_reject_code = 554

# rules restrictions
smtpd_client_restrictions =
smtpd_helo_restrictions =
smtpd_sender_restrictions =
smtpd_recipient_restrictions = 
 permit_sasl_authenticated,
 check_policy_service inet:127.0.0.1:10023,
        permit_mynetworks,
        reject_unauth_destination,
        reject_non_fqdn_sender,
        reject_non_fqdn_recipient,
        reject_unknown_recipient_domain,
 check_client_access hash:/etc/postfix/rbl_override,
 check_sender_access hash:/etc/postfix/sender_access
# uncomment for realtime black list checks. (Warn: will also reject false positive)
        ,reject_rbl_client zen.spamhaus.org
       ,reject_rbl_client bl.spamcop.net
       ,reject_rbl_client dnsbl.sorbs.net
 ,reject_rbl_client cbl.abuseat.org

smtpd_helo_required = yes
#unknown_local_recipient_reject_code = 554
disable_vrfy_command = yes
smtpd_data_restrictions = reject_unauth_pipelining
smtpd_banner = $myhostname ESMTP

message_size_limit = 20480000

Postfix Config (master.cf)

Code:
#
# Postfix master process configuration file.  For details on the format
# of the file, see the Postfix master(5) manual page.
#
# ***** Unused items removed *****
# ==========================================================================
# service type  private unpriv  chroot  wakeup  maxproc command + args
#               (yes)   (yes)   (yes)   (never) (100)
# ==========================================================================
smtp      inet  n       -       n       -       -       smtpd
 -o content_filter=spamassassin
#  -o content_filter=smtp-amavis:127.0.0.1:10024
#  -o receive_override_options=no_address_mappings
pickup    fifo  n       -       n       60      1       pickup
  -o content_filter= 
  -o receive_override_options=no_header_body_checks
cleanup   unix  n       -       n       -       0       cleanup
qmgr      fifo  n       -       n       300     1       qmgr
#qmgr     fifo  n       -       n       300     1       oqmgr
tlsmgr    unix  -       -       n       1000?   1       tlsmgr
rewrite   unix  -       -       n       -       -       trivial-rewrite
bounce    unix  -       -       n       -       0       bounce
defer     unix  -       -       n       -       0       bounce
trace     unix  -       -       n       -       0       bounce
verify    unix  -       -       n       -       1       verify
flush     unix  n       -       n       1000?   0       flush
proxymap  unix  -       -       n       -       -       proxymap
smtp      unix  -       -       n       -       -       smtp
# When relaying mail as backup MX, disable fallback_relay to avoid MX loops
relay     unix  -       -       n       -       -       smtp
        -o fallback_relay=
#       -o smtp_helo_timeout=5 -o smtp_connect_timeout=5
showq     unix  n       -       n       -       -       showq
error     unix  -       -       n       -       -       error
discard   unix  -       -       n       -       -       discard
local     unix  -       n       n       -       -       local
virtual   unix  -       n       n       -       -       virtual
lmtp      unix  -       -       n       -       -       lmtp
anvil     unix  -       -       n       -       1       anvil
scache    unix  -       -       n       -       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.
# ====================================================================
maildrop  unix  -       n       n       -       -       pipe
  flags=DRhu user=vmail argv=/usr/local/bin/maildrop -d ${recipient}
uucp      unix  -       n       n       -       -       pipe
  flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)
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=foo argv=/usr/local/sbin/bsmtp -f $sender $nexthop $recipient
#
# spam/virus section
#
smtp-amavis  unix  -    -       y       -       2       smtp
  -o smtp_data_done_timeout=1200
  -o disable_dns_lookups=yes
  -o smtp_send_xforward_command=yes
127.0.0.1:10025 inet n  -       y       -       -       smtpd
  -o content_filter=
  -o smtpd_helo_restrictions=
  -o smtpd_sender_restrictions=
  -o smtpd_recipient_restrictions=permit_mynetworks,reject
  -o mynetworks=127.0.0.0/8
  -o smtpd_error_sleep_time=0
  -o smtpd_soft_error_limit=1001
  -o smtpd_hard_error_limit=1000
  -o receive_override_options=no_header_body_checks
  -o smtpd_helo_required=no
  -o smtpd_restriction_classes=
  -o disable_vrfy_command=no
  -o strict_rfc821_envelopes=yes

  -o syslog_name=postfix/submission
  -o smtpd_tls_security_level=encrypt
  -o smtpd_sasl_auth_enable=yes
  -o smtpd_client_restrictions=permit_sasl_authenticated,reject

#
# Dovecot LDA
dovecot   unix  -       n       n       -       -       pipe
  flags=DRhu user=vmail:mail argv=/usr/lib/dovecot/deliver -d ${recipient}
#
# Vacation mail
vacation    unix  -       n       n       -       -       pipe
  flags=Rq user=vacation argv=/var/spool/vacation/vacation.pl -f ${sender} -- ${recipient}
spamassassin unix - n n - - pipe user=spamd argv=/usr/bin/spamc -f -e /usr/sbin/sendmail -oi -f ${sender} ${recipient}

Hope someone here can help me to stop the email spam, and get my email server more secure Smile

Do you have a reverse dns setup I have the same ones blocking me because my isp set the reverse dns wrong

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(07-26-2017, 05:08 PM)type-00 Wrote: [ -> ]Do you have a reverse dns setup I have the same ones blocking me because my isp set the reverse dns wrong

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I dont think so

Are you hosting the server or is it being hosted elsewhere

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JonathanNet

type-00

JonathanNet

type-00