Undestanding Postfix Relay System

vaio1 · Dec 13, 2015

Hi guys,
why I get from the /var/log/mail.log four different way to relay a message?
For instance:

Nov 30 16:10:13 mailserver postfix/pipe[3943]: 10CED15F8282: to=<[email protected]>, relay=dovecot, delay=0.04, delays=0.01/0/0/0.03, dsn=2.0.0, status=sent (delivered via dovecot service)

Nov 30 16:10:46 mailserver postfix/pipe[3933]: F2DE915F8212: to=<[email protected]>, relay=spamassassin, delay=36, delays=35/0/0/0.78, dsn=2.0.0, status=sent (delivered via spamassassin service)

Nov 30 16:10:58 mailserver postfix/smtp[3939]: E50B915F8285: to=<[email protected]>, relay=127.0.0.1[127.0.0.1]:10024, delay=11, delays=0.01/0/0/11, dsn=2.0.0, status=sent (250 2.0.0 from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as 04C7415F8212)

Nov 30 16:10:36 mailserver postfix/smtp[3981]: 4280515F8285: to=<[email protected]>, relay=mail.externaldomain.eu[89.31.75.14]:25, delay=0.2, delays=0.01/0/0.16/0.03, dsn=2.0.0, status=sent (250 2.0.0 Ok: queued as 8329A201F4)
Click to expand...

thanks

till · Dec 13, 2015

On a ispconfig server there should be no relay lines to a spamassassin service as ispconfig uses amavis.

vaio1 · Dec 13, 2015

... but the spamassassin relay lines are there... so what do you suggest me?

what about the other lines?

till · Dec 13, 2015

Please post your main.cf and master.cf files (rename domain names in the files).

vaio1 · Dec 13, 2015

This is the main.cf

myhostname = mail.mydomain.com
mydomain=mydomain.com
mydestination = mail.mydomain.com, localhost, localhost.localdomain
#mydestination = localhost.$mydomain, localhost

relayhost = 109.168.116.236

mynetworks = 109.168.116.238 109.168.116.234 webserver.mydomain.com 127.0.0.0/8 [::1]/128

smtpd_error_sleep_time = 1s
smtpd_soft_error_limit = 10
smtpd_hard_error_limit = 20
smtpd_client_message_rate_limit = 100
smtpd_sasl_auth_enable = yes
smtpd_sasl_type=dovecot
smtpd_sasl_path=private/auth

#smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination, check_recipient_access mysql:/etc/postfix/mysql-virtual_recipient.cf
smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, check_recipient_access mysql:/etc/postfix/mysql-virtual_recipient.cf, reject_unauth_destination

smtpd_sasl_security_options = noanonymous
smtpd_sasl_local_domain =
smtpd_sender_restrictions = check_sender_access mysql:/etc/postfix/mysql-virtual_sender.cf
smtpd_client_restrictions = check_client_access mysql:/etc/postfix/mysql-virtual_client.cf

smtpd_sasl_authenticated_header = yes

# TLS parameters
smtpd_use_tls = yes
smtpd_tls_security_level = may
smtpd_tls_cert_file = /etc/postfix/smtpd.cert
smtpd_tls_key_file = /etc/postfix/smtpd.key
smtp_tls_security_level = may
smtp_tls_protocols = !SSLv2,!SSLv3
smtpd_tls_mandatory_protocols = !SSLv2, !SSLv3
smtpd_tls_protocols = !SSLv2,!SSLv3

#smtpd_relay_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination
smtpd_relay_restrictions = permit_mynetworks, permit_sasl_authenticated, check_recipient_access mysql:/etc/postfix/mysql-virtual_recipient.cf, reject_unauth_destination

broken_sasl_auth_clients = yes

readme_directory = /usr/share/doc/postfix
html_directory = /usr/share/doc/postfix/html
alias_maps = hash:/etc/aliases, hash:/var/lib/mailman/data/aliases
alias_database = hash:/etc/aliases, hash:/var/lib/mailman/data/aliases
virtual_alias_domains =
virtual_alias_maps = hash:/var/lib/mailman/data/virtual-mailman, proxy:mysql:/etc/postfix/mysql-virtual_forwardings.cf, proxy:mysql:/etc/postfix/mysql-virtual_email2email.cf
virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysql-virtual_domains.cf
virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql-virtual_mailboxes.cf
virtual_mailbox_base = /var/vmail
virtual_uid_maps = static:5000
virtual_gid_maps = static:5000
inet_protocols = all

transport_maps = hash:/var/lib/mailman/data/transport-mailman, proxy:mysql:/etc/postfix/mysql-virtual_transports.cf
relay_domains = mysql:/etc/postfix/mysql-virtual_relaydomains.cf
relay_recipient_maps = mysql:/etc/postfix/mysql-virtual_relayrecipientmaps.cf
proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virtual_alias_domains $virtual_mailbox_maps $virtual_mailbox_domains $relay_recipient_maps $relay_domains $canonical_maps $sender_canonical_maps $recipient_canonical_maps $relocated_maps $transport_maps $mynetworks
maildrop_destination_concurrency_limit = 1
maildrop_destination_recipient_limit = 1
virtual_transport = dovecot
header_checks = regexp:/etc/postfix/header_checks
mime_header_checks = regexp:/etc/postfix/mime_header_checks
nested_header_checks = regexp:/etc/postfix/nested_header_checks
body_checks = regexp:/etc/postfix/body_checks
owner_request_special = no

dovecot_destination_recipient_limit = 1

content_filter = amavis:[127.0.0.1]:10024
receive_override_options = no_address_mappings
mailbox_size_limit = 0
message_size_limit = 0
inet_interfaces = all
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
smtp_sasl_security_options =
Click to expand...

vaio1 · Dec 13, 2015

This is the 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 content_filter=spamassassin
# -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
-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.
# ====================================================================
#
# maildrop. See the Postfix MAILDROP_README file for details.
# Also specify in main.cf: maildrop_destination_recipient_limit=1
#
maildrop unix - n n - - pipe
flags=DRhu user=vmail argv=/usr/bin/maildrop -d vmail ${extension} ${recipient} ${user} ${nexthop} ${sender}
#
# ====================================================================
#
# Recent Cyrus versions can use the existing "lmtp" master.cf entry.
#
# Specify in cyrus.conf:
# lmtp cmd="lmtpd -a" listen="localhost:lmtp" proto=tcp4
#
# Specify in main.cf one or more of the following:
# mailbox_transport = lmtp:inet:localhost
# virtual_transport = lmtp:inet:localhost
#
# ====================================================================
#
# Cyrus 2.1.5 (Amos Gouaux)
# Also specify in main.cf: cyrus_destination_recipient_limit=1
#
#cyrus unix - n n - - pipe
# user=cyrus argv=/cyrus/bin/deliver -e -r ${sender} -m ${extension} ${user}
#
# ====================================================================
# Old example of delivery via Cyrus.
#
#old-cyrus unix - n n - - pipe
# flags=R user=cyrus argv=/cyrus/bin/deliver -e -m ${extension} ${user}
#
# ====================================================================
#
# See the Postfix UUCP_README file for configuration details.
#
uucp unix - n n - - pipe
flags=Fqhu user=uucp argv=uux -r -n -z -a$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}

dovecot unix - n n - - pipe
flags=DRhu user=vmail:vmail argv=/usr/lib/dovecot/deliver -f ${sender} -d ${user}@${nexthop}
amavis unix - - - - 2 smtp
-o smtp_data_done_timeout=1200
-o smtp_send_xforward_command=yes
-o disable_dns_lookups=yes
-o max_use=20

127.0.0.1:10025 inet n - - - - smtpd
-o local_recipient_maps=
-o relay_recipient_maps=
-o smtpd_restriction_classes=
-o smtpd_client_restrictions=
-o smtpd_helo_restrictions=
-o smtpd_sender_restrictions=
-o smtpd_recipient_restrictions=permit_mynetworks,reject
-o mynetworks=127.0.0.0/8
-o content_filter=
-o strict_rfc821_envelopes=yes
-o receive_override_options=no_unknown_recipient_checks,no_header_body_checks
# -o smtpd_bind_address=127.0.0.1

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

spamassassin unix - n n - - pipe
user=spamd argv=/usr/bin/spamc -f -e /usr/sbin/sendmail -oi -f ${sender} ${recipient}
Click to expand...

till · Dec 13, 2015

Edit the master.cf file, change:

smtp inet n - - - - smtpd -o content_filter=spamassassin

to:

smtp inet n - - - - smtpd

and restart poszfix. Currently you send email twice trough spamassassin, once trogh the spamassassin transport and then a second time trough the amavis transport.

vaio1 · Dec 13, 2015

Ok! Thanks Till! Fixed.
... but which is the differences between these sending methods?

till · Dec 14, 2015

Email that came in by smtp made a extra trip trough spamassassin while the mails trough smtps went directly to amavis. Now all mails go trough amavis and amavis filters them with the spamassassin filter.

vaio1 · Dec 14, 2015

So is it correct the master.cf with this line?

spamassassin unix - n n - - pipe user=spamd argv=/usr/bin/spamc -f -e /usr/sbin/sendmail -oi -f ${sender} ${recipient}
Click to expand...

till · Dec 14, 2015

This line is not used anymore as we disabled it in the smtp line, so you can leave it or remove it.

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Undestanding Postfix Relay System

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Undestanding Postfix Relay System

vaio1 ISPConfig Developer ISPConfig Developer

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