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Need Help: Postfix Relayhost Setup and Dovecot

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  • Dominique
    Hi, I am trying to migrate from cyrus - (Ubuntu 12.04 LTS Server, Mysql Postfix, cyrus, webcyradmin, saslauth) to dovecot - (Ubuntu 12.04 LTS Server, Mysql
    Message 1 of 3 , Nov 18, 2013
    • 0 Attachment
      Hi,

      I am trying to migrate from cyrus - (Ubuntu 12.04 LTS Server, Mysql
      Postfix, cyrus, webcyradmin, saslauth) to dovecot - (Ubuntu 12.04 LTS
      Server, Mysql Postfix, Dovecot, Postfixadmin, saslauth)
      It all works fine with postfix/cyrus.
      However under postfix/dovecot, I have a problem with my relayhost setup.
      I got the following message in mail.log:

      Nov 18 17:10:15 mail postfix/smtp[20654]: 2937521D41:
      to=<xxxx@...>, relay=smtp.isp.es[1.1.1.1]:25, delay=1.1,
      delays=0.09/0/0.87/0.18, dsn=5.0.0, status=bounced (host
      smtp.isp.es[1.1.1.1] said: 522 Authenticate first (in reply to MAIL FROM
      command))

      I understand that I need to authenticate first for the relayhost to kick
      in, and I thought I had it. (Applied the same logic from the cyrus
      setup), but it seems I missed something.

      Can someone give me a hint ?

      main.cf

      append_dot_mydomain = no
      biff = no
      broken_sasl_auth_clients = yes
      config_directory = /etc/postfix
      content_filter = amavis:[127.0.0.1]:10024
      delay_warning_time = 4h
      disable_vrfy_command = yes
      dovecot_destination_recipient_limit = 1
      enable_original_recipient = no
      header_checks = regexp:/etc/postfix/header_checks
      inet_interfaces = all
      local_recipient_maps =
      mailbox_size_limit = 0
      maximal_backoff_time = 8000s
      maximal_queue_lifetime = 7d
      minimal_backoff_time = 1000s
      mydestination =
      myhostname = mail.solipym.com
      mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128,192.168.1.0/24
      mynetworks_style = host
      myorigin = /etc/mailname
      readme_directory = no
      recipient_delimiter = +
      relayhost = smtp.isp.es
      smtp_enforce_tls = no
      smtp_helo_timeout = 60s
      smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
      smtp_tls_note_starttls_offer = yes
      smtp_tls_security_level = may
      smtp_use_tls = yes
      smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
      smtpd_client_restrictions = permit_mynetworks, reject_rbl_client
      sbl.spamhaus.org, reject_rbl_client blackholes.easynet.nl
      smtpd_data_restrictions = reject_unauth_pipelining
      smtpd_delay_reject = yes
      smtpd_enforce_tls = no
      smtpd_hard_error_limit = 12
      smtpd_helo_required = yes
      smtpd_helo_restrictions = permit_mynetworks, warn_if_reject
      reject_non_fqdn_hostname, reject_invalid_hostname, permit
      smtpd_recipient_limit = 16
      smtpd_recipient_restrictions = permit_sasl_authenticated,
      permit_mynetworks, reject_unauth_destination, reject_invalid_hostname,
      reject_non_fqdn_hostname, reject_non_fqdn_sender,
      reject_non_fqdn_recipient, reject_unknown_sender_domain,
      reject_unknown_recipient_domain, reject_unauth_pipelining,
      reject_rbl_client bl.spamcop.net, reject_rbl_client zen.spamhaus.org,
      reject_rbl_client blackholes.easynet.nl, reject_rbl_client
      dul.dnsbl.sorbs.net, check_policy_service inet:127.0.0.1:10023, permit
      smtpd_sasl_auth_enable = yes
      smtpd_sasl_authenticated_header = yes
      smtpd_sasl_local_domain =
      smtpd_sasl_path = private/auth
      smtpd_sasl_security_options = noanonymous
      smtpd_sasl_type = dovecot
      smtpd_sender_restrictions = permit_mynetworks, warn_if_reject
      reject_non_fqdn_sender, reject_unknown_sender_domain,
      reject_unauth_pipelining, permit
      smtpd_soft_error_limit = 3
      smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem
      smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key
      smtpd_tls_loglevel = 1
      smtpd_tls_received_header = yes
      smtpd_tls_security_level = may
      smtpd_tls_session_cache_timeout = 3600s
      smtpd_use_tls = yes
      tls_random_source = dev:/dev/urandom
      unknown_local_recipient_reject_code = 450
      virtual_alias_maps = mysql:/etc/postfix/mysql_virtual_alias_maps.cf,
      mysql:/etc/postfix/mysql_virtual_alias_domainaliases_maps.cf
      virtual_gid_maps = static:8
      virtual_mailbox_base = /var/vmail
      virtual_mailbox_domains = mysql:/etc/postfix/mysql_virtual_domains_maps.cf
      virtual_mailbox_maps = mysql:/etc/postfix/mysql_virtual_mailbox_maps.cf,
      mysql:/etc/postfix/mysql_virtual_mailbox_domainaliases_maps.cf
      virtual_transport = dovecot
      virtual_uid_maps = static:150

      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 on port 25, unencrypted.
      smtp inet n - - - - smtpd
      -o syslog_name=postfix/smtp
      -o smtpd_tls_wrappermode=yes
      -o smtpd_sasl_auth_enable=yes
      -o smtpd_tls_auth_only=yes
      -o
      smtpd_client_restrictions=permit_sasl_authenticated,reject_unauth_destination,reject
      -o smtpd_sasl_security_options=noanonymous,noplaintext
      -o smtpd_sasl_tls_security_options=noanonymous
      #smtp inet n - - - 1 postscreen
      #smtpd pass - - - - - smtpd
      #dnsblog unix - - - - 0 dnsblog
      #tlsproxy unix - - - - 0 tlsproxy

      # SMTP over SSL on port 465.
      smtps inet n - - - - smtpd
      -o syslog_name=postfix/smtps
      -o smtpd_tls_wrappermode=yes
      -o smtpd_sasl_auth_enable=yes
      -o smtpd_tls_auth_only=yes
      -o
      smtpd_client_restrictions=permit_sasl_authenticated,reject_unauth_destination,reject
      -o smtpd_sasl_security_options=noanonymous,noplaintext
      -o smtpd_sasl_tls_security_options=noanonymous
      # -o smtpd_client_restrictions=permit_sasl_authenticated,reject
      # -o milter_macro_daemon_name=ORIGINATING

      submission inet n - n - - smtpd

      #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 - 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
      relay unix - - - - - smtp
      # -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}
      #
      # ====================================================================
      #
      # 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}

      # The next two entries integrate with Amavis for anti-virus/spam checks.
      amavis unix - - - - 3 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_checks

      # Integration with Dovecot - hand mail over to it for local delivery, and
      # run the process under the vmail user and mail group.
      dovecot unix - n n - - pipe
      flags=DRhu user=vmail:mail argv=/usr/lib/dovecot/dovecot-lda -d
      $(recipient)



      ---
      This email is free from viruses and malware because avast! Antivirus protection is active.
      http://www.avast.com
    • lists@rhsoft.net
      ... smtp_sasl_auth_enable = yes is nowhere in your posted configuration notice smtp_ versus smtpd_ while anyhting which is relevant for sending message sto
      Message 2 of 3 , Nov 18, 2013
      • 0 Attachment
        Am 18.11.2013 17:36, schrieb Dominique:
        > Nov 18 17:10:15 mail postfix/smtp[20654]: 2937521D41:
        > to=<xxxx@...>, relay=smtp.isp.es[1.1.1.1]:25, delay=1.1,
        > delays=0.09/0/0.87/0.18, dsn=5.0.0, status=bounced (host
        > smtp.isp.es[1.1.1.1] said: 522 Authenticate first (in reply to MAIL FROM
        > command))
        >
        > I understand that I need to authenticate first for the relayhost to kick
        > in, and I thought I had it. (Applied the same logic from the cyrus
        > setup), but it seems I missed something.
        >
        > Can someone give me a hint ?

        smtp_sasl_auth_enable = yes
        is nowhere in your posted configuration

        notice smtp_ versus smtpd_ while anyhting which is
        relevant for sending message sto another MTA is smtp_
      • Noel Jones
        ... Did you read: http://www.postfix.org/SASL_README.html#client_sasl At this time, the Dovecot SASL implementation does not provide client functionality. --
        Message 3 of 3 , Nov 18, 2013
        • 0 Attachment
          On 11/18/2013 10:36 AM, Dominique wrote:
          > Hi,
          >
          > I am trying to migrate from cyrus - (Ubuntu 12.04 LTS Server, Mysql
          > Postfix, cyrus, webcyradmin, saslauth) to dovecot - (Ubuntu 12.04 LTS
          > Server, Mysql Postfix, Dovecot, Postfixadmin, saslauth)
          > It all works fine with postfix/cyrus.
          > However under postfix/dovecot, I have a problem with my relayhost setup.
          > I got the following message in mail.log:
          >
          > Nov 18 17:10:15 mail postfix/smtp[20654]: 2937521D41:
          > to=<xxxx@...>, relay=smtp.isp.es[1.1.1.1]:25, delay=1.1,
          > delays=0.09/0/0.87/0.18, dsn=5.0.0, status=bounced (host
          > smtp.isp.es[1.1.1.1] said: 522 Authenticate first (in reply to MAIL FROM
          > command))

          Did you read:
          http://www.postfix.org/SASL_README.html#client_sasl

          "At this time, the Dovecot SASL implementation does not provide
          client functionality."



          -- Noel Jones


          >
          > I understand that I need to authenticate first for the relayhost to kick
          > in, and I thought I had it. (Applied the same logic from the cyrus
          > setup), but it seems I missed something.
          >
          > Can someone give me a hint ?
          >
          > main.cf
          >
          > append_dot_mydomain = no
          > biff = no
          > broken_sasl_auth_clients = yes
          > config_directory = /etc/postfix
          > content_filter = amavis:[127.0.0.1]:10024
          > delay_warning_time = 4h
          > disable_vrfy_command = yes
          > dovecot_destination_recipient_limit = 1
          > enable_original_recipient = no
          > header_checks = regexp:/etc/postfix/header_checks
          > inet_interfaces = all
          > local_recipient_maps =
          > mailbox_size_limit = 0
          > maximal_backoff_time = 8000s
          > maximal_queue_lifetime = 7d
          > minimal_backoff_time = 1000s
          > mydestination =
          > myhostname = mail.solipym.com
          > mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128,192.168.1.0/24
          > mynetworks_style = host
          > myorigin = /etc/mailname
          > readme_directory = no
          > recipient_delimiter = +
          > relayhost = smtp.isp.es
          > smtp_enforce_tls = no
          > smtp_helo_timeout = 60s
          > smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
          > smtp_tls_note_starttls_offer = yes
          > smtp_tls_security_level = may
          > smtp_use_tls = yes
          > smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
          > smtpd_client_restrictions = permit_mynetworks, reject_rbl_client
          > sbl.spamhaus.org, reject_rbl_client blackholes.easynet.nl
          > smtpd_data_restrictions = reject_unauth_pipelining
          > smtpd_delay_reject = yes
          > smtpd_enforce_tls = no
          > smtpd_hard_error_limit = 12
          > smtpd_helo_required = yes
          > smtpd_helo_restrictions = permit_mynetworks, warn_if_reject
          > reject_non_fqdn_hostname, reject_invalid_hostname, permit
          > smtpd_recipient_limit = 16
          > smtpd_recipient_restrictions = permit_sasl_authenticated,
          > permit_mynetworks, reject_unauth_destination, reject_invalid_hostname,
          > reject_non_fqdn_hostname, reject_non_fqdn_sender,
          > reject_non_fqdn_recipient, reject_unknown_sender_domain,
          > reject_unknown_recipient_domain, reject_unauth_pipelining,
          > reject_rbl_client bl.spamcop.net, reject_rbl_client zen.spamhaus.org,
          > reject_rbl_client blackholes.easynet.nl, reject_rbl_client
          > dul.dnsbl.sorbs.net, check_policy_service inet:127.0.0.1:10023, permit
          > smtpd_sasl_auth_enable = yes
          > smtpd_sasl_authenticated_header = yes
          > smtpd_sasl_local_domain =
          > smtpd_sasl_path = private/auth
          > smtpd_sasl_security_options = noanonymous
          > smtpd_sasl_type = dovecot
          > smtpd_sender_restrictions = permit_mynetworks, warn_if_reject
          > reject_non_fqdn_sender, reject_unknown_sender_domain,
          > reject_unauth_pipelining, permit
          > smtpd_soft_error_limit = 3
          > smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem
          > smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key
          > smtpd_tls_loglevel = 1
          > smtpd_tls_received_header = yes
          > smtpd_tls_security_level = may
          > smtpd_tls_session_cache_timeout = 3600s
          > smtpd_use_tls = yes
          > tls_random_source = dev:/dev/urandom
          > unknown_local_recipient_reject_code = 450
          > virtual_alias_maps = mysql:/etc/postfix/mysql_virtual_alias_maps.cf,
          > mysql:/etc/postfix/mysql_virtual_alias_domainaliases_maps.cf
          > virtual_gid_maps = static:8
          > virtual_mailbox_base = /var/vmail
          > virtual_mailbox_domains = mysql:/etc/postfix/mysql_virtual_domains_maps.cf
          > virtual_mailbox_maps = mysql:/etc/postfix/mysql_virtual_mailbox_maps.cf,
          > mysql:/etc/postfix/mysql_virtual_mailbox_domainaliases_maps.cf
          > virtual_transport = dovecot
          > virtual_uid_maps = static:150
          >
          > 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 on port 25, unencrypted.
          > smtp inet n - - - - smtpd
          > -o syslog_name=postfix/smtp
          > -o smtpd_tls_wrappermode=yes
          > -o smtpd_sasl_auth_enable=yes
          > -o smtpd_tls_auth_only=yes
          > -o
          > smtpd_client_restrictions=permit_sasl_authenticated,reject_unauth_destination,reject
          > -o smtpd_sasl_security_options=noanonymous,noplaintext
          > -o smtpd_sasl_tls_security_options=noanonymous
          > #smtp inet n - - - 1 postscreen
          > #smtpd pass - - - - - smtpd
          > #dnsblog unix - - - - 0 dnsblog
          > #tlsproxy unix - - - - 0 tlsproxy
          >
          > # SMTP over SSL on port 465.
          > smtps inet n - - - - smtpd
          > -o syslog_name=postfix/smtps
          > -o smtpd_tls_wrappermode=yes
          > -o smtpd_sasl_auth_enable=yes
          > -o smtpd_tls_auth_only=yes
          > -o
          > smtpd_client_restrictions=permit_sasl_authenticated,reject_unauth_destination,reject
          > -o smtpd_sasl_security_options=noanonymous,noplaintext
          > -o smtpd_sasl_tls_security_options=noanonymous
          > # -o smtpd_client_restrictions=permit_sasl_authenticated,reject
          > # -o milter_macro_daemon_name=ORIGINATING
          >
          > submission inet n - n - - smtpd
          >
          > #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 - 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
          > relay unix - - - - - smtp
          > # -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}
          > #
          > # ====================================================================
          > #
          > # 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}
          >
          > # The next two entries integrate with Amavis for anti-virus/spam checks.
          > amavis unix - - - - 3 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_checks
          >
          > # Integration with Dovecot - hand mail over to it for local delivery, and
          > # run the process under the vmail user and mail group.
          > dovecot unix - n n - - pipe
          > flags=DRhu user=vmail:mail argv=/usr/lib/dovecot/dovecot-lda -d
          > $(recipient)
          >
          >
          >
          > ---
          > This email is free from viruses and malware because avast! Antivirus protection is active.
          > http://www.avast.com
          >
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