[TriLUG] sendmail question
Jason Tower
jason at cerient.net
Sat Apr 5 16:08:44 EST 2003
at the risk of starting a flamewar, you might consider using postfix
instead of sendmail. it is available pre-packaged with redhat 8 and 9
(whch i presume you are using based on your post) and is generally
easier to setup. setting up a basic postfix server requires only a
handful of changes to the stock config file and a 'service postfix
restart' to be up and running. most folks who run sendmail do so
because they've used it for years and are accustomed to it - since this
is not the case for you postfix is probably easier to wrap your head
around.
jason
On Saturday 05 April 2003 15:58, mike wrote:
> OK so I'm new to sendmail and having a problem getting it set up. I
> can receive mail fine but cannot send mail. An entry from the log
> file for one of the times I've tried to send a message looks like the
> following:
>
> Apr 5 15:42:26 REDHAT1 sendmail[2127]: h35KgPuB002125:
> to=<wigglefish2003 at yahoo.com>, ctladdr=<mike at REDHAT1.canismajor.org>
> (500/500), delay=00:00:01, xdelay=00:00:01, mailer=relay, pri=30664,
> relay=smtp-server.nc.rr.com [24.93.67.206], dsn=2.0.0, stat=Sent
> (09de80838200543FE4 Queued mail for delivery)
>
> I'm including the config files below. I'm sure it's something simple
> that I'm doing wrong but I don't know how to fix it. Any help would
> be greatly appreciated.
>
>
> /etc/mail/access looks like the following:
>
> localhost.localdomain RELAY
> localhost RELAY
> 127.0.0.1 RELAY
> canismajor.org RELAY
> REDHAT1.canismajor.org RELAY
>
>
> /etc/mail/local-host-names looks like the following:
>
> canismajor.org
> REDHAT1.canismajor.org
>
> /etc/hosts looks like the following:
>
> 127.0.0.1 localhost.localdomain localhost
> 192.168.0.2 REDHAT1.canismajor.org REDHAT1
>
>
> /etc/mail/sendmail.mc looks like the follwing:
>
> 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 #
> define(`SMART_HOST',`smtp-server.nc.rr.com')
> dnl #
> define(`confDEF_USER_ID',``8:12'')dnl
> define(`confTRUSTED_USER', `smmsp')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
> 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 #
> dnl TRUST_AUTH_MECH(`EXTERNAL DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl
> 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=MTA')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
> Cwlocalhost.localdomain
> CwREDHAT1.canismajor.org
>
>
>
>
>
>
>
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