postfix config problem

Discussion in 'Server Operation' started by bob808, May 8, 2009.

  1. bob808

    bob808 New Member

    Hello all. I am running an Ubuntu 8.10 perfect server with ispconfig 2.

    In time I found that I have to configure very good postfix. Because of spammers and to increase security I found myself in the middle of a config-line spaghetti.

    My master.cf is :

    #
    # 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 message_size_limit=25000000
    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
    -o message_size_limit=25000000
    -o smtpd_tls_wrappermode=yes
    smtps 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
    -o smtpd_tls_wrappermode=yes
    -o message_size_limit=25000000
    #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 ${recipient}
    #
    # See the Postfix UUCP_README file for configuration details.
    #
    uucp unix - n n - - pipe
    flags=Fqhu user=uucp argv=uux -r -n -z -a$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}


    I had some spammers problem and I had to use port 587 for submitting email.
    Because most computers in my company have Microsoft Outlook 2003 witch does not support TLS, I must use port 587 with SSL option. I wish to close port 25 for submitting emails also port 467. I want only 587 with ssl and tls. What to I keep and what do I comment out?
    Also when I run a postconf /etc/postfix/master.cf I get an error saying that smtp is twice in the master.cf file. I commented out the second one from bottom, and then I couldn't send emails outside my network. Why are there 2 smtp options? e.g. smtp inet n - - - - smtpd

    Furthermore, how secure is sending email over port 587 with ssl or tls? Does the actual email message gets encrypted between the client sending it and my server that's receiving it? Or only the password gets encrypted?
    I just put -o smtpd_tls_wrappermode=yes under submission port settings and now I can send emails via 587 with SSL, but TLS on 587 doesn't work anymore. Is it supposed to work that way?

    Hope someone clears out all that for me because I was looking alot for this info on the internet and couldn't find all info I need.
    Thank you very much and have a nice day.
     
    Last edited: May 8, 2009
  2. bob808

    bob808 New Member

    Hmmz...
    Can anyone tell me how do I close port 25 for sending emails, leave 587 only with TLS and 465 with ssl and without?
    what lines do I comment out and what lines do I leave?
    this should be easy but I'm somewhat a beginner...
     
  3. falko

    falko Super Moderator ISPConfig Developer

    To close port 25, comment out the line
    Code:
    smtp inet n - - - - smtpd
     

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