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Thread: sendmail smarthost to send to gmail or my own server

  1. #1
    Join Date
    May 2005
    Location
    New Zealand
    Beans
    93
    Distro
    Ubuntu 12.04 Precise Pangolin

    sendmail smarthost to send to gmail or my own server

    Hi,

    First of all, I apologise, because this seems like a well-discussed topic, but I am posting here anyway, because I couldn't get it working for quite a while now, even though there are lots of tutorials:

    I would like to send email from my local machine to my server or gmail's smtp server, because my ISP does not allow my machine to send email (Argh!). I don't mind if there is a gmail header or similar because I just need it to test my local PHP applications like Drupal and CiviCRM.

    I followed this first:
    http://darrynvt.wordpress.com/2012/0...or-gmail-smtp/
    but it did not work for me.

    My /etc/mail/sendmail.mc file:

    Code:
    divert(-1)dnl
    #-----------------------------------------------------------------------------
    # $Sendmail: debproto.mc,v 8.14.4 2011-08-14 09:21:51 cowboy Exp $
    #
    # Copyright (c) 1998-2010 Richard Nelson.  All Rights Reserved.
    #
    # cf/debian/sendmail.mc.  Generated from sendmail.mc.in by configure.
    #
    # sendmail.mc prototype config file for building Sendmail 8.14.4
    #
    # Note: the .in file supports 8.7.6 - 9.0.0, but the generated
    #	file is customized to the version noted above.
    #
    # This file is used to configure Sendmail for use with Debian systems.
    #
    # If you modify this file, you will have to regenerate /etc/mail/sendmail.cf
    # by running this file through the m4 preprocessor via one of the following:
    #	* make   (or make -C /etc/mail)
    #	* sendmailconfig 
    #	* m4 /etc/mail/sendmail.mc > /etc/mail/sendmail.cf
    # The first two options are preferred as they will also update other files
    # that depend upon the contents of this file.
    #
    # The best documentation for this .mc file is:
    # /usr/share/doc/sendmail-doc/cf.README.gz
    #
    #-----------------------------------------------------------------------------
    divert(0)dnl
    #
    #   Copyright (c) 1998-2005 Richard Nelson.  All Rights Reserved.
    #
    #  This file is used to configure Sendmail for use with Debian systems.
    #
    define(`_USE_ETC_MAIL_')dnl
    include(`/usr/share/sendmail/cf/m4/cf.m4')dnl
    VERSIONID(`$Id: sendmail.mc, v 8.14.4-2ubuntu2 2011-08-14 09:21:51 cowboy Exp $')
    OSTYPE(`debian')dnl
    DOMAIN(`debian-mta')dnl
    dnl # Items controlled by /etc/mail/sendmail.conf - DO NOT TOUCH HERE
    undefine(`confHOST_STATUS_DIRECTORY')dnl        #DAEMON_HOSTSTATS=
    dnl # Items controlled by /etc/mail/sendmail.conf - DO NOT TOUCH HERE
    dnl #
    dnl # General defines
    dnl #
    dnl # SAFE_FILE_ENV: [undefined] If set, sendmail will do a chroot()
    dnl #	into this directory before writing files.
    dnl #	If *all* your user accounts are under /home then use that
    dnl #	instead - it will prevent any writes outside of /home !
    dnl #   define(`confSAFE_FILE_ENV',             `')dnl
    dnl #
    dnl # Daemon options - restrict to servicing LOCALHOST ONLY !!!
    dnl # Remove `, Addr=' clauses to receive from any interface
    dnl # If you want to support IPv6, switch the commented/uncommentd lines
    dnl #
    FEATURE(`no_default_msa')dnl
    dnl DAEMON_OPTIONS(`Family=inet6, Name=MTA-v6, Port=smtp, Addr=::1')dnl
    DAEMON_OPTIONS(`Family=inet,  Name=MTA-v4, Port=smtp, Addr=127.0.0.1')dnl
    dnl DAEMON_OPTIONS(`Family=inet6, Name=MSP-v6, Port=submission, M=Ea, Addr=::1')dnl
    DAEMON_OPTIONS(`Family=inet,  Name=MSP-v4, Port=submission, M=Ea, Addr=127.0.0.1')dnl
    dnl #
    dnl # Be somewhat anal in what we allow
    define(`confPRIVACY_FLAGS',dnl
    `needmailhelo,needexpnhelo,needvrfyhelo,restrictqrun,restrictexpand,nobodyreturn,authwarnings')dnl
    dnl #
    dnl # Define connection throttling and window length
    define(`confCONNECTION_RATE_THROTTLE', `15')dnl
    define(`confCONNECTION_RATE_WINDOW_SIZE',`10m')dnl
    dnl #
    dnl # Features
    dnl #
    dnl # use /etc/mail/local-host-names
    FEATURE(`use_cw_file')dnl
    dnl #
    dnl # The access db is the basis for most of sendmail's checking
    FEATURE(`access_db', , `skip')dnl
    dnl #
    dnl # The greet_pause feature stops some automail bots - but check the
    dnl # provided access db for details on excluding localhosts...
    FEATURE(`greet_pause', `1000')dnl 1 seconds
    dnl #
    dnl # Delay_checks allows sender<->recipient checking
    FEATURE(`delay_checks', `friend', `n')dnl
    dnl #
    dnl # If we get too many bad recipients, slow things down...
    define(`confBAD_RCPT_THROTTLE',`3')dnl
    dnl #
    dnl # Stop connections that overflow our concurrent and time connection rates
    FEATURE(`conncontrol', `nodelay', `terminate')dnl
    FEATURE(`ratecontrol', `nodelay', `terminate')dnl
    dnl #
    dnl # If you're on a dialup link, you should enable this - so sendmail
    dnl # will not bring up the link (it will queue mail for later)
    dnl define(`confCON_EXPENSIVE',`True')dnl
    dnl #
    dnl # Dialup/LAN connection overrides
    dnl #
    include(`/etc/mail/m4/dialup.m4')dnl
    include(`/etc/mail/m4/provider.m4')dnl
    dnl #
    
    include(`/etc/mail/tls/starttls.m4')dnl
    define(`SMART_HOST',`smtp.gmail.com')dnl
    define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl
    define(`RELAY_MAILER_ARGS', `TCP $h 587')
    define(`ESMTP_MAILER_ARGS', `TCP $h 587')
    FEATURE(`authinfo',`hash /etc/mail/auth/client-info')dnl
    define(`CERT_DIR', `MAIL_SETTINGS_DIR/certs')
    define(`confCACERT_PATH', `CERT_DIR')
    define(`confCACERT', `CERT_DIR/CAcert.pem')
    define(`confSERVER_CERT', `CERT_DIR/mycert.pem')
    define(`confSERVER_KEY', `CERT_DIR/mykey.pem')
    define(`confCLIENT_CERT', `CERT_DIR/mycert.pem')
    define(`confCLIENT_KEY', `CERT_DIR/mykey.pem')
    
    dnl # Masquerading options
    FEATURE(`always_add_domain')dnl
    MASQUERADE_AS(`ihostnz.com')dnl
    dnl # FEATURE(`allmasquerade')dnl
    FEATURE(`masquerade_envelope')dnl
    FEATURE(`genericstable')dnl
    GENERICS_DOMAIN(`localhost.localdomain')dnl
    MASQUERADE_DOMAIN(`galaxy')dnl
    
    dnl # Default Mailer setup
    dnl MAILER_DEFINITIONS
    dnl define(`SMART_HOST', `ihostnz.com')dnl
    dnl MAILER(`local')dnl
    dnl MAILER(`smtp')dnl
    My hostname is galaxy.

    My /var/log/mail.log file:
    Code:
    Mar 18 00:59:14 galaxy sendmail[6762]: unable to qualify my own domain name (galaxy) -- using short name
    Mar 18 00:59:15 galaxy sendmail[6762]: q2HBxEul006762: from=geekdenz, size=86, class=0, nrcpts=1, msgid=<201203171159.q2HBxEul006762@galaxy>, relay=geekdenz@localhost
    Mar 18 00:59:15 galaxy sm-mta[7315]: STARTTLS=server, relay=localhost [127.0.0.1], version=TLSv1/SSLv3, verify=NOT, cipher=DHE-DSS-AES256-SHA, bits=256/256
    Mar 18 00:59:15 galaxy sendmail[6762]: STARTTLS=client, relay=[127.0.0.1], version=TLSv1/SSLv3, verify=FAIL, cipher=DHE-DSS-AES256-SHA, bits=256/256
    Mar 18 00:59:15 galaxy sm-mta[7315]: q2HBxF4d007315: SYSERR(root): buildaddr: unknown mailer unknown
    Mar 18 00:59:15 galaxy sendmail[6762]: q2HBxEul006762: to=<th.heuer@gmail.com>, ctladdr=geekdenz (1000/1000), delay=00:00:01, xdelay=00:00:00, mailer=relay, pri=30086, relay=[127.0.0.1] [127.0.0.1], dsn=5.3.5, stat=Service unavailable
    Mar 18 00:59:15 galaxy sm-mta[7315]: q2HBxF4d007315: from=<geekdenz@galaxy>, size=86, class=0, nrcpts=0, proto=ESMTP, daemon=MTA-v4, relay=localhost [127.0.0.1]
    Mar 18 01:00:01 galaxy sm-msp-queue[7766]: My unqualified host name (galaxy) unknown; sleeping for retry
    Mar 18 01:01:01 galaxy sm-msp-queue[7766]: unable to qualify my own domain name (galaxy) -- using short name
    There is always a long delay when I send an email like:
    Code:
    echo test email | mail -s mysubject my@gmail.com
    Help! I really need it because I've been stuck on this for many hours now and I need to get the project off the ground.

    Using Ubuntu 11.10.

    Many thanks!

  2. #2
    Join Date
    Jul 2009
    Location
    South Africa
    Beans
    168
    Distro
    Ubuntu

    Lightbulb Re: sendmail smarthost to send to gmail or my own server

    First off, for what you are trying to do, I would use postfix rather than sendmail. Postfix was adapted from sendmail, but is
    ...an alternative to the widely-used Sendmail program. Postfix attempts to be fast, easy to administer, and secure.
    from thier website.

    There's a guide for reference here:

    https://help.ubuntu.com/8.04/serverguide/C/postfix.html

    But you wouldn't need to do everything in that guide, as a lot of it is security that you don't need if you are not relaying mail for clients outside your network.

    If you are using it for sending mail only, I wouldn't worry about what mailbox type to choose as you won't be using it. If you think you might start using it later, use Maildir as its easy enough to work with.

    Finally, for relaying mail, you will need to authenticate against the Gmail server or it won't let you do anything. Just have a look here:

    http://www.dnsexit.com/support/mailrelay/postfix.html

    Looking at your post above, you are relaying mail via localhost, in other words, once your server is recieving mail, it sees that it is not the delivery location for your mail, and then refers to the relay host which is localhost (itself), and will be sitting with the same problem all over. Do you see the problem?

    I assume you don't have a domain, a static internet IP for your server, and that you don't have an MX record pointing to your static ip from the DNS of your domian? If you don't know what I'm talking about, then the first part of my post is all you need.

    Hope that helps
    Last edited by Demented ZA; March 17th, 2012 at 01:47 PM.

  3. #3
    Join Date
    May 2005
    Location
    New Zealand
    Beans
    93
    Distro
    Ubuntu 12.04 Precise Pangolin

    Smile Re: sendmail smarthost to send to gmail or my own server

    This did the trick! Thanks so much! Also added a post to my blog so that I don't loose this info @ http://www.thheuer.com/2012/03/smtp-...e-development/.

    I ended up using my ISP's smtp server. Why do they block port 25 when one can just use their smtp server to spam??

    I guess they have a bit more control then. So if they detect a spammer, they can block that machine, but still...
    Web Application Design and linux support:
    Tim-H. Heuer.

  4. #4
    Join Date
    Jul 2009
    Location
    South Africa
    Beans
    168
    Distro
    Ubuntu

    Re: sendmail smarthost to send to gmail or my own server

    Awesome, glad it helped.

    Your isp doesn't allow anyone to connect to their smtp server, only clients on their network, such as you. Connecting to the smtp server from your isp, serves as a method of authentication to the smtp server and will help to identify you in case they need to trace those nasty spammers.

    They block port 25 for security. Spam has very little to do with it.

  5. #5
    Join Date
    May 2005
    Location
    New Zealand
    Beans
    93
    Distro
    Ubuntu 12.04 Precise Pangolin

    Re: sendmail smarthost to send to gmail or my own server

    Thanks for the insight!
    Web Application Design and linux support:
    Tim-H. Heuer.

  6. #6
    Join Date
    Oct 2011
    Beans
    35

    Re: sendmail smarthost to send to gmail or my own server

    There were a problem with your sendmail configuration, was not need to exchange it with postfix

    Simply uncomment: dnl MAILER(`smtp')dnl -> MAILER(`smtp')dnl would do the magic.

  7. #7
    Join Date
    Nov 2009
    Beans
    5

    Re: sendmail smarthost to send to gmail or my own server

    Configuring postfix (sendmail) is certainly not easy. I made a small user-friendly script for a no-questions-asked installation and configuration of postfix with Gmail.

    The script configures postfix to relay mail to smtp.gmail.com (which will send your emails to the world). Check out the https://gist.github.com/3952294
    and please tell me if it works for you (or not)

    P.S. I checked the script on Ubuntu 12.04, but it should work on previous versions as well. Before running the script, uninstall everything you manually configured on your machine (e.g. exim4 maybe), and also, you should consider purging postfix with

    Code:
    sudo apt-get purge postfix

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