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  • Linux Question about sendmail

    Afternoon all,

    Sorry for asking this question here but I know there are a few people who are very good with linux.

    I currently have a virtual server hosted with a company called servolocity (http://www.10by10.co.uk/57/)

    I have set-up my web / mail server and I can send / recieve mails fine via webmail actually running on the box. My problem is I cannot send mail via my outlook / PPC account but I can send mail.

    To me it sounds like some relaying problem where it will only send mail from itself but I dont know how to disable this to allow me to send mail via outlook or my PPC

    Thanks

    Michael

    P.s. I have full root ssh access to the virtual server so I can pretty much do anything change files etc
    Michael Armstrong
    www.m80arm.co.uk
    MCITP: EA, MCTS, MCSE 2003, MCSA 2003: Messaging, CCA, VCP 3.5, 4, 5, VCAP5-DCD, VCAP5-DCA, ITIL, MCP, PGP Certified Technician

    ** Remember to give credit where credit is due and leave reputation points sigpic where appropriate **

  • #2
    Re: Linux Question about sendmail

    It all depends on how the sendmail is configured.
    What distro is the server running ?
    Can you attach the /etc/mail/sendmail.mc file ?
    Guy Teverovsky
    "Smith & Wesson - the original point and click interface"

    Comment


    • #3
      Re: Linux Question about sendmail

      Fedora core 1


      divert(`-1')dnl
      dnl #
      dnl # This is the sendmail macro config file for m4. If you make changes to
      dnl # /etc/mail/sendmail.mc, you will need to regenerate the
      dnl # /etc/mail/sendmail.cf file by confirming that the sendmail-cf package is
      dnl # installed and then performing a
      dnl #
      dnl # make -C /etc/mail
      dnl #
      include(`/usr/share/sendmail-cf/m4/cf.m4')dnl
      VERSIONID(`setup for Red Hat Linux')dnl
      OSTYPE(`linux')dnl
      dnl #
      dnl # Uncomment and edit the following line if your outgoing mail needs to
      dnl # be sent out through an external mail server:
      dnl #
      dnl define(`SMART_HOST', `smtp.your.provider')
      dnl #
      define(`confDEF_USER_ID', ``8:12'')dnl
      dnl define(`confAUTO_REBUILD')dnl
      define(`confTO_CONNECT', `1m')dnl
      define(`confTRY_NULL_MX_LIST', `true')dnl
      define(`confDONT_PROBE_INTERFACES', `true')dnl
      define(`PROCMAIL_MAILER_PATH', `/usr/bin/procmail')dnl
      define(`ALIAS_FILE', `/etc/aliases')dnl
      dnl define(`STATUS_FILE', `/etc/mail/statistics')dnl
      define(`UUCP_MAILER_MAX', `2000000')dnl
      define(`confUSERDB_SPEC', `/etc/mail/userdb.db')dnl
      define(`confPRIVACY_FLAGS', `authwarnings,novrfy,noexpn,restrictqrun')dnl
      define(`confAUTH_OPTIONS', `A')dnl
      define(`POP_B4_SMTP_TAG')dnl
      HACK(`popauth')dnl
      dnl #
      dnl # The following allows relaying if the user authenticates, and disallows
      dnl # plaintext authentication (PLAIN/LOGIN) on non-TLS links
      dnl #
      dnl define(`confAUTH_OPTIONS', `A p')dnl
      dnl #
      dnl # PLAIN is the preferred plaintext authentication method and used by
      dnl # Mozilla Mail and Evolution, though Outlook Express and other MUAs do
      dnl # use LOGIN. Other mechanisms should be used if the connection is not
      dnl # guaranteed secure.
      dnl #
      TRUST_AUTH_MECH(`EXTERNAL DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl
      define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl
      dnl #
      dnl # Rudimentary information on creating certificates for sendmail TLS:
      dnl # make -C /usr/share/ssl/certs usage
      dnl #
      dnl define(`confCACERT_PATH', `/usr/share/ssl/certs')
      dnl define(`confCACERT', `/usr/share/ssl/certs/ca-bundle.crt')
      dnl define(`confSERVER_CERT', `/usr/share/ssl/certs/sendmail.pem')
      dnl define(`confSERVER_KEY', `/usr/share/ssl/certs/sendmail.pem')
      dnl #
      dnl # This allows sendmail to use a keyfile that is shared with OpenLDAP's
      dnl # slapd, which requires the file to be readble by group ldap
      dnl #
      dnl define(`confDONT_BLAME_SENDMAIL', `groupreadablekeyfile')dnl
      dnl #
      dnl define(`confTO_QUEUEWARN', `4h')dnl
      dnl define(`confTO_QUEUERETURN', `5d')dnl
      dnl define(`confQUEUE_LA', `12')dnl
      dnl define(`confREFUSE_LA', `18')dnl
      define(`confTO_IDENT', `0')dnl
      dnl FEATURE(`delay_checks')dnl
      FEATURE(`no_default_msa', `dnl')dnl
      FEATURE(`smrsh', `/usr/sbin/smrsh')dnl
      FEATURE(`mailertable', `hash -o /etc/mail/mailertable.db')dnl
      FEATURE(`virtusertable', `hash -o /etc/mail/virtusertable.db')dnl
      FEATURE(`redirect')dnl
      FEATURE(`always_add_domain')dnl
      FEATURE(`use_cw_file')dnl
      FEATURE(`use_ct_file')dnl
      dnl #
      dnl # The -t option will retry delivery if e.g. the user runs over his quota.
      dnl #
      FEATURE(`local_procmail', `', `procmail -t -Y -a $h -d $u')dnl
      FEATURE(`access_db', `hash -T<TMPF> -o /etc/mail/access.db')dnl
      FEATURE(`blacklist_recipients')dnl
      EXPOSED_USER(`root')dnl
      dnl #
      dnl # The following causes sendmail to only listen on the IPv4 loopback address
      dnl # 127.0.0.1 and not on any other network devices. Remove the loopback
      dnl # address restriction to accept email from the internet or intranet.
      dnl #
      DAEMON_OPTIONS(`Port=smtp, Name=MSA, M=E')dnl
      dnl #
      dnl # The following causes sendmail to additionally listen to port 587 for
      dnl # mail from MUAs that authenticate. Roaming users who can't reach their
      dnl # preferred sendmail daemon due to port 25 being blocked or redirected find
      dnl # this useful.
      dnl #
      dnl DAEMON_OPTIONS(`Port=submission, Name=MSA, M=Ea')dnl
      dnl #
      dnl # The following causes sendmail to additionally listen to port 465, but
      dnl # starting immediately in TLS mode upon connecting. Port 25 or 587 followed
      dnl # by STARTTLS is preferred, but roaming clients using Outlook Express can't
      dnl # do STARTTLS on ports other than 25. Mozilla Mail can ONLY use STARTTLS
      dnl # and doesn't support the deprecated smtps; Evolution <1.1.1 uses smtps
      dnl # when SSL is enabled-- STARTTLS support is available in version 1.1.1.
      dnl #
      dnl # For this to work your OpenSSL certificates must be configured.
      dnl #
      dnl DAEMON_OPTIONS(`Port=smtps, Name=TLSMTA, M=s')dnl
      dnl #
      dnl # The following causes sendmail to additionally listen on the IPv6 loopback
      dnl # device. Remove the loopback address restriction listen to the network.
      dnl #
      dnl # NOTE: binding both IPv4 and IPv6 daemon to the same port requires
      dnl # a kernel patch
      dnl #
      dnl DAEMON_OPTIONS(`port=smtp,Addr=::1, Name=MTA-v6, Family=inet6')dnl
      dnl #
      dnl # We strongly recommend not accepting unresolvable domains if you want to
      dnl # protect yourself from spam. However, the laptop and users on computers
      dnl # that do not have 24x7 DNS do need this.
      dnl #
      FEATURE(`accept_unresolvable_domains')dnl
      dnl #
      dnl FEATURE(`relay_based_on_MX')dnl
      dnl #
      dnl # Also accept email sent to "localhost.localdomain" as local email.
      dnl #
      LOCAL_DOMAIN(`localhost.localdomain')dnl
      dnl #
      dnl # The following example makes mail from this host and any additional
      dnl # specified domains appear to be sent from mydomain.com
      dnl #
      dnl MASQUERADE_AS(`mydomain.com')dnl
      dnl #
      dnl # masquerade not just the headers, but the envelope as well
      dnl #
      dnl FEATURE(`masquerade_envelope')dnl
      dnl #
      dnl # masquerade not just @mydomainalias.com, but @*.mydomainalias.com as well
      dnl #
      dnl FEATURE(`masquerade_entire_domain')dnl
      dnl #
      dnl MASQUERADE_DOMAIN(`localhost')dnl
      dnl MASQUERADE_DOMAIN(`localhost.localdomain')dnl
      dnl MASQUERADE_DOMAIN(`mydomainalias.com')dnl
      dnl MASQUERADE_DOMAIN(`mydomain.lan')dnl
      MAILER(`smtp')dnl
      MAILER(`procmail')dnl
      Michael Armstrong
      www.m80arm.co.uk
      MCITP: EA, MCTS, MCSE 2003, MCSA 2003: Messaging, CCA, VCP 3.5, 4, 5, VCAP5-DCD, VCAP5-DCA, ITIL, MCP, PGP Certified Technician

      ** Remember to give credit where credit is due and leave reputation points sigpic where appropriate **

      Comment


      • #4
        Re: Linux Question about sendmail

        Looks fine... I would add the changes below to masquarade the outgoing mail to your SMTP domain.

        Code:
        MASQUERADE_AS(`mydomain.com')dnl
        dnl #
        dnl # masquerade not just the headers, but the envelope as well
        dnl #
        FEATURE(`masquerade_envelope')dnl
        dnl #
        dnl # masquerade not just @mydomainalias.com, but @*.mydomainalias.com as well
        dnl #
        FEATURE(`masquerade_entire_domain')dnl
        dnl #
        dnl MASQUERADE_DOMAIN(`localhost')dnl
        dnl MASQUERADE_DOMAIN(`localhost.localdomain')dnl
        MASQUERADE_DOMAIN(`mydomain.com')dnl
        dnl MASQUERADE_DOMAIN(`mydomain.lan')dnl
        After changing /etc/mail/sendmail.mc, do:
        Code:
        mv /etc/mail/sendmail.cf /etc/mail/sendmail.cf.bak
        make -C /etc/mail
        /etc/init.d/sendmail restart
        According to the config, you should also use SMTP authentication when trying to sened the mail from outside of the server to addresses not hosted on the box. In Outlook this should be something like "My outgoing server requires authentication".
        Guy Teverovsky
        "Smith & Wesson - the original point and click interface"

        Comment

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