[Workaround.org] Postfix not rejecting internal emails to mis-typed addresses

Greg Wilson gwilson at summerland.com.au
Wed Aug 13 05:39:18 CEST 2008


I was using the Postfix-Courier solution and recently upgraded to the
Postfix-Dovecot solution when I migrated to a new mail server. As I
didn't want to rebuild the mysql user tables in the new format I stayed
with the old style of full email address in one table.

 

The problem I have is that Postfix is accepting emails (from internal
users only) to non-valid account names in my virtual domains and
creating mail folders for them.

i.e. If there's a valid user account jsmith I see the following folders:
jsmit jsmithh jjsmith etc

 

I've been through the configs but I can't see what's causing the
problem. Could one of you gurus please give me some help?

 

Main.cf

# See /usr/share/postfix/main.cf.dist for a commented, more complete
version

 

 

# Debian specific:  Specifying a file name will cause the first

# line of that file to be used as the name.  The Debian default

# is /etc/mailname.

#myorigin = /etc/mailname

 

smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)

biff = no

message_size_limit = 12288000

 

# appending .domain is the MUA's job.

append_dot_mydomain = no

 

# Uncomment the next line to generate "delayed mail" warnings

#delay_warning_time = 4h

 

# TLS parameters

smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem

smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key

smtpd_use_tls=yes

smtpd_tls_session_cache_database = btree:${queue_directory}/smtpd_scache

smtp_tls_session_cache_database = btree:${queue_directory}/smtp_scache

broken_sasl_auth_clients = yes

 

# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package
for

# information on enabling SSL in the smtp client.

 

myhostname = mail.summerland.com.au

alias_maps = hash:/etc/aliases

alias_database = hash:/etc/aliases

 

 

myorigin = summerland.com.au

mydestination = localhost

relayhost = 

mynetworks = 127.0.0.0/8,10.122.0.0/17,10.99.122.0/24

mailbox_size_limit = 0

recipient_delimiter = +

inet_interfaces = all

 

virtual_alias_maps = mysql:/etc/postfix/mysql-virtual_forwardings.cf
mysql:/etc/postfix/mysql-virtual_email2email.cf 

 

virtual_mailbox_domains = mysql:/etc/postfix/mysql-virtual_domains.cf

virtual_mailbox_maps = mysql:/etc/postfix/mysql-virtual_mailboxes.cf

virtual_mailbox_base = /home/vmail

virtual_uid_maps = static:5000

virtual_gid_maps = static:5000

 

 

#Big Brother automatic bcc of mail to and from a user

sender_bcc_maps = hash:/etc/postfix/sender_bcc

recipient_bcc_maps = hash:/etc/postfix/recipient_bcc

 

#Use Dovecot to put mail in Imap folders

virtual_transport = dovecot

dovecot_destination_recipient_limit = 1

content_filter = smtp-amavis:[127.0.0.1]:10024

receive_override_options = no_address_mappings

 

 

#Postgrey setup

#Comment 'check policy service' line to disable postgrey

#NEVER comment others or spam relaying will occur!!!

smtpd_client_restrictions =

    hash:/etc/postfix/access

    permit_mynetworks

    permit_sasl_authenticated

    reject_unauth_pipelining

    reject_unauth_destination

    reject_rbl_client bl.spamcop.net

    reject_rbl_client dynablock.njabl.org

    reject_rbl_client zen.spamhaus.org

    reject_rbl_client list.dsbl.org

    check_policy_service inet:127.0.0.1:60000 

 

 

#Added for Mailman

relay_domains = lists.summerland.com.au 

transport_maps = hash:/etc/postfix/transport

mailman_destination_recipient_limit = 1

 

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").

#

#
========================================================================
==

# service type  private unpriv  chroot  wakeup  maxproc command + args

#               (yes)   (yes)   (yes)   (never) (100)

#
========================================================================
==

smtp-amavis unix -      -       n     -       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 content_filter=

    -o local_recipient_maps=

    -o relay_recipient_maps=

    -o smtpd_restriction_classes=

    -o smtpd_delay_reject=no

    -o smtpd_client_restrictions=permit_mynetworks,reject

    -o smtpd_helo_restrictions=

    -o smtpd_sender_restrictions=

    -o smtpd_recipient_restrictions=permit_mynetworks,reject

    -o smtpd_data_restrictions=reject_unauth_pipelining

    -o smtpd_end_of_data_restrictions=

    -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 smtpd_client_connection_count_limit=0

    -o smtpd_client_connection_rate_limit=0

    -o
receive_override_options=no_header_body_checks,no_unknown_recipient_chec
ks

    -o local_header_rewrite_clients=

smtp      inet  n       -       -       -       -       smtpd

#submission inet n       -       -       -       -       smtpd

#  -o smtpd_enforce_tls=yes

#  -o smtpd_sasl_auth_enable=yes

#  -o smtpd_client_restrictions=permit_sasl_authenticated,reject

#smtps     inet  n       -       -       -       -       smtpd

#  -o smtpd_tls_wrappermode=yes

#  -o smtpd_sasl_auth_enable=yes

#  -o smtpd_client_restrictions=permit_sasl_authenticated,reject

#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

smtp      unix  -       -       -       -       -       smtp

# When relaying mail as backup MX, disable fallback_relay to avoid MX
loops

relay     unix  -       -       -       -       -       smtp

            -o fallback_relay=

#       -o smtp_helo_timeout=5 -o smtp_connect_timeout=5

showq     unix  n       -       -       -       -       showq

error     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

  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 -d
${recipient}

 

 

 

--
Greg Wilson
IT & Infrastructure Co-ordinator
Summerland Credit Union, Lismore
Ph 02 6620 7010
Fax 02 6622 0264
gwilson at summerland.com.au

P Please consider the environment before printing this e-mail. 

 

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