Administrace komentářů

Zdárek borci, snažím se donutit Postfix používat SSL/TLS. Pokud se někdo připojí ke mně, tak se normálně TLS nainicializuje a komunikace běží na portu 465 nebo 587 téměř vždy, když to zdrojová strana podporuje. To je OK. Problém je, když odesílám já. Postfix se ani nesnaží navázat TLS spojení a rovnou to pošle přes port 25 nešifrovaně.
Je nějaká možnost, jak Postfix donutit k tomu, aby nejdříve vyzkoušel porty 465/587 šifrovaně a teprve pokud by nebyly tyto porty dostupné, tak aby to poslal nešifrovaně přes 25 ? Můj main.cf

smtpd_banner = $myhostname ESMTP $mail_name (Debian)

# Obecne definice
myhostname = neon.domena.cz
mydomain = domena.cz
myorigin = $mydomain
inet_interfaces = all
mydestination = $myhostname, localhost.$mydomain
mynetworks_style = host
mynetworks = 127.0.0.0/8, "moje_ip_adresy"
alias_maps = hash:/etc/aliases

# velikost zprav
message_size_limit = 40960000

# TLS setup
smtp_enforce_tls = yes
smtpd_enforce_tls = yes


lmtp_use_tls = yes
lmtp_tls_note_starttls_offer = yes
lmtp_tls_security_level = may
lmtp_tls_cert_file = /etc/postfix/ssl/neon.domena.cz.cert
lmtp_tls_key_file = /etc/postfix/ssl/neon.domena.cz.key
lmtp_tls_CAfile = /etc/postfix/ssl/ca.pem

smtp_use_tls = yes
smtp_tls_note_starttls_offer = yes
smtp_tls_security_level = may
smtp_tls_cert_file = /etc/postfix/ssl/neon.domena.cz.cert
smtp_tls_key_file = /etc/postfix/ssl/neon.domena.cz.key
smtp_tls_CAfile = /etc/postfix/ssl/ca.pem

smtpd_use_tls = yes
smtpd_tls_cert_file = /etc/postfix/ssl/neon.domena.cz.cert
smtpd_tls_key_file = /etc/postfix/ssl/neon.domena.cz.key
smtpd_tls_CAfile = /etc/postfix/ssl/ca.pem
smtpd_tls_loglevel = 1
smtpd_tls_received_header = yes
smtpd_tls_security_level = may
smtpd_tls_session_cache_timeout = 3600s
smtpd_tls_auth_only = yes
tls_random_source = dev:/dev/urandom

smtpd_tls_session_cache_database = btree:/var/lib/postfix/smtpd_scache
smtp_tls_session_cache_database = btree:/var/lib/postfix/smtp_scache


# SMTP restrikce
unknown_local_recipient_reject_code = 550
smtpd_recipient_restrictions = permit_sasl_authenticated,
        reject_non_fqdn_hostname,
        reject_non_fqdn_sender,
        reject_non_fqdn_recipient,
        reject_invalid_hostname,
        permit_mynetworks,
        reject_unknown_sender_domain,
        reject_unknown_recipient_domain,
        reject_unauth_destination,
        reject_unauth_pipelining,
        # Toto kontroluje spam listy
        check_client_access hash:/etc/postfix/rbl_override,
        reject_rbl_client cbl.abuseat.org,
        reject_rbl_client zen.spamhaus.org,
        reject_rbl_client bl.spamcop.net,
        reject_rbl_client dul.dnsbl.sorbs.net,
        reject_rbl_client sbl-xbl.spamhaus.org,
        reject_rbl_client rabl.nuclearelephant.com,
        reject_rbl_client combined.rbl.msrbl.net,
        check_policy_service inet:127.0.0.1:10023

smtpd_sender_restrictions = permit_mynetworks,
        reject_non_fqdn_sender,
        reject_unknown_address,
        reject_unknown_sender_domain,
        permit

smtpd_data_restrictions =
            reject_unauth_pipelining,
            permit
smtpd_helo_restrictions =
        permit_mynetworks,
        reject_non_fqdn_helo_hostname,
        reject_invalid_helo_hostname,
        permit

smtpd_helo_required = yes
disable_vrfy_command = yes
smtpd_delay_reject = yes

smtpd_error_sleep_time = 2s
smtpd_soft_error_limit = 20
smtpd_hard_error_limit = 30

# ClamAV setup
content_filter = scan:127.0.0.1:10025
receive_override_options = no_address_mappings

# Mapy
transport_maps = hash:/etc/postfix/transport

A můj master.cf

#
# 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
        -o content_filter=spamassassin
#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 content_filter=spamassassin
        -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
        -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
scan      unix  -       -       n       -       16      smtp
        -o smtp_send_xforward_command=yes

# For injecting mail back into postfix from the filter
127.0.0.1:10026 inet  n -       n       -       16      smtpd
        -o content_filter=
        -o receive_override_options=no_unknown_recipient_checks,no_header_body_checks
        -o smtpd_helo_restrictions=
        -o smtpd_client_restrictions=
        -o smtpd_sender_restrictions=
        -o smtpd_recipient_restrictions=permit_mynetworks,reject
        -o mynetworks_style=host
        -o smtpd_authorized_xforward_hosts=127.0.0.0/8
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}

spamassassin unix - n n - - pipe
        user=debian-spamd argv=/usr/bin/spamc -f -e /usr/sbin/sendmail -oi -f ${sender} ${recipient}
maildrop  unix  -       n       n       -       -       pipe
  flags=DRhu user=vmail argv=/usr/bin/maildrop -d ${recipient}