Hi,
I'm running the combination of Postfix, Postfix-GLD (Greylisting) and
DBMail(MDA) as a stand-alone
Internet host on a Ubuntu-9.04 system. The file 'sql-recipients.cf' provides
the MySQL access
information for the list of mail-aliases in DBMail and 'sql-domains.cf'
provides the list of
virtual domains extracted from the mail-aliases.
What Postfix shall do:
- listen on all public and private IPs for incoming SMTP-connections
- relay mail from the internet to DBmail via LMTP on loopback device if the
recipient address
matches a mail-alias and the recipient restrictions are met (FQDN, GLD, SPF,
etc.)
- relay mail from private networks to DBMail via LMTP on loopback device if the
recipient address
matches a mail-alias an the sender domain matches a virtual domain. No other
restrictions
- relay from private networks to the internet if the sender domain matches a
virtual domain. No
other restrictions
- Do NOT relay anything from internet to internet (avoid open relay)
- use only public IP xxx.xxx.xxx.xxx for relaying mail to the internet
- Use TLS-encryption and -authentification whenever possible on internet
connections (does it make
sense to force TLS or are there too many non-TLS mail servers out there?) but
don't use it with
private networks
What Postfix currently doesn't do:
- it relays mail to the internet but only accepts mail for 'mydomain'
('mydestination' commented out)
- it accepts mail for all virtual domains but does not relay to the internet
(Message not sent. Server replied:
Action not performed: mailbox not available
550 5.1.1 <[email protected]>: Recipient address rejected: User unknown in
local recipient table)
('mydestination' NOT commented out)
- it uses TLS on any connection and does not allow unecrypted and
unauthenticated access to
private networks
Thanx for any hint,
Renne
master.cf:
------------------------------------ snip
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#
# 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
smtp inet n - 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 - - n - - 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 ${recipient}
#
# See the Postfix UUCP_README file for configuration details.
#
uucp unix - n n - - pipe
uucp unix - n n - - pipe
flags=Fqhu user=uucp argv=uux -r -n -z -a$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 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}
# DBMail
dbmail-lmtp unix - - n - - lmtp
# SPF checks
policy-spf unix - n n - - spawn
user=nobody argv=/usr/bin/policyd-spf
------------------------------------ snap
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main.cf:
------------------------------------ snip
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smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
biff = no
append_dot_mydomain = no
readme_directory = no
recipient_delimiter = +
mail_owner = postfix
setgid_group = postdrop
mydomain = <mydomain>
myhostname = $mydomain
myorigin = $mydomain
mynetworks = 10.214.224.0/24 10.214.234.0/24 127.0.0.0/8
mydestination = mysql:/etc/postfix/sql-domains.cf
relay_domains =
relayhost =
inet_interfaces = all
message_size_limit = 67108864
mailbox_size_limit = 134217728
mailbox_transport = dbmail-lmtp:127.0.0.1:24
local_transport = dbmail-lmtp:127.0.0.1:24
local_recipient_maps = mysql:/etc/postfix/sql-recipients.cf
spf-policyd_time_limit = 3600s
smtpd_recipient_restrictions =
permit_mynetworks,
reject_non_fqdn_sender,
reject_non_fqdn_recipient,
reject_unknown_sender_domain,
reject_unknown_recipient_domain,
reject_unauth_destination,
reject_unlisted_recipient,
check_client_access cidr:/etc/postfix/dnswl/postfix-dnswl-header,
check_client_access cidr:/etc/postfix/dnswl/postfix-dnswl-permit,
check_policy_service unix:private/policy-spf,
check_policy_service inet:127.0.0.1:2525,
permit
## Disable NIS support (superfluos log warnings)
#alias_maps =
smtp_tls_security_level = encrypt
smtpd_tls_security_level = encrypt
##smtp_tls_security_level = may
##smtpd_tls_security_level = may
smtpd_tls_auth_only = no
smtp_tls_note_starttls_offer = yes
smtpd_tls_key_file = /etc/ssl/private/<my>.key
smtpd_tls_cert_file = /etc/ssl/certs/<my>.crt
smtpd_tls_CApath = /etc/ssl/certs
smtpd_tls_loglevel = 1
smtpd_tls_received_header = yes
smtpd_tls_session_cache_timeout = 3600s
tls_random_source = dev:/dev/urandom
------------------------------------ snap
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