Cannot send email out with Sendmail on Fedora Core 2

smaier · 07-28-2004, 04:04 PM

I am getting desperate now. I have been searching the internet for 2 days trying all kinds of things to get sendmail to send an email, but all attempts have failed so far. Hopefully, someone can point out my mistake......

I am unable to send email out from my box to any external email addresses. Internal seems to work fine. I can, however, receive emails just fine. My server name is 'spacedock', IP 10.96.119.100, and it is sitting on a internal network behind a Netgear router which is connected to a cable modem. I have opened port 25 on the router for the server and I have temporarily disabled the firewall running on the server.

I get the following error message when I try to send to an external email address:

Code:

[smaier@spacedock smaier]$ /usr/sbin/sendmail -v smaier3@hotmail.com
This is a test.
.
hotmail.com: Name server timeout
smaier3@hotmail.com... Transient parse error -- message queued for future delivery
smaier3@hotmail.com... queued

If I use dig I do not get any error messages.

Code:

[smaier@spacedock smaier]$ dig hotmail.com AAAA

; <<>> DiG 9.2.3 <<>> hotmail.com AAAA
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 60207
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;hotmail.com.                   IN      A

;; ANSWER SECTION:
hotmail.com.            80      IN      A       64.4.33.7

;; Query time: 24 msec
;; SERVER: 10.96.119.1#53(10.96.119.1)
;; WHEN: Wed Jul 28 16:42:58 2004
;; MSG SIZE  rcvd: 45

[smaier@spacedock smaier]$ dig hotmail.com MX

; <<>> DiG 9.2.3 <<>> hotmail.com MX
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 22411
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;hotmail.com.                   IN      A

;; ANSWER SECTION:
hotmail.com.            80      IN      A       64.4.33.7

;; Query time: 2 msec
;; SERVER: 10.96.119.1#53(10.96.119.1)
;; WHEN: Wed Jul 28 16:43:49 2004
;; MSG SIZE  rcvd: 45

[smaier@spacedock smaier]$ dig hotmail.com A

; <<>> DiG 9.2.3 <<>> hotmail.com A
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 57296
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;hotmail.com.                   IN      A

;; ANSWER SECTION:
hotmail.com.            80      IN      A       64.4.33.7

;; Query time: 2 msec
;; SERVER: 10.96.119.1#53(10.96.119.1)
;; WHEN: Wed Jul 28 16:44:26 2004
;; MSG SIZE  rcvd: 45

nslookup returns:

Code:

[smaier@spacedock smaier]$ nslookup hotmail.com
Server:         10.96.119.1
Address:        10.96.119.1#53

Non-authoritative answer:
Name:   hotmail.com
Address: 64.4.33.7

Anybody have any ideas or suggestions?

Here are my configuration settings:

/etc/mail/sendmail.mc

Code:

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 # default logging level is 9, you might want to set it higher to
dnl # debug the configuration
dnl #
dnl define(`confLOG_LEVEL', `9')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
define(`STATUS_FILE', `/var/log/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 # Please remember that saslauthd needs to be running for AUTH.
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 # or use the included makecert.sh script
dnl #
define(`CERT_DIR',`/etc/mail/certs')
define(`confCACERT_PATH',`CERT_DIR')
define(`confCACERT',`CERT_DIR/cacert.pem')
define(`confSERVER_CERT',`CERT_DIR/cert.pem')
define(`confSERVER_KEY',`CERT_DIR/key.pem')
define(`confCLIENT_CERT',`CERT_DIR/cert.pem')
define(`confCLIENT_KEY',`CERT_DIR/key.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 #
dnl DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, 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 DAEMON_OPTIONS(`port=smtp,Addr=::1, Name=MTA-v6, Family=inet6')dnl
dnl #
dnl # enable both ipv6 and ipv4 in sendmail:
dnl #
dnl DAEMON_OPTIONS(`Name=MTA-v4, Family=inet, Name=MTA-v6, Family=inet6')
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 #
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(`smaier.net')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
define(`confBIND_OPTS', `WorkAroundBrokenAAAA')dnl

/etc/mail/access

Code:

localhost.localdomain           RELAY
localhost                       RELAY
127.0.0.1                       RELAY
spacedock.smaier.net            RELAY
spacedock                       RELAY

/etc/sysconfig/network

Code:

NETWORKING=yes
HOSTNAME=spacedock

SheldonPlankton · 07-28-2004, 04:20 PM

what's your mailog say?

tail -f /var/log/maillog

smaier · 07-28-2004, 04:27 PM

Here is what gets posted to the maillog when I try to send a message out:

Code:

Jul 28 17:24:37 spacedock sendmail[2831]: i6SLOH4G002831: from=smaier, size=16, class=0, nrcpts=1, msgid=<200407282124.i6SLOH4G002831@spacedock.smaier.net>, relay=smaier@localhost
Jul 28 17:24:37 spacedock sendmail[2831]: i6SLOH4G002831: to=smaier3@hotmail.com, delay=00:00:20, mailer=esmtp, pri=30016, dsn=4.4.3, stat=queued

SheldonPlankton · 07-28-2004, 05:22 PM

Ahh I think I got it ...

Code:

[root@localhost mail]# diff sendmail.mc sendmail.mc.orig
17c17
< define(`SMART_HOST',`blah.balhblah.com')
---
> dnl define(`SMART_HOST',`smtp.your.provider')

Uncomment the SMART_HOST line in your sendmail.mc then ...

Code:

# /etc/init.d/sendmail stop
# make -C /etc/mail
# /etc/init.d/sendmail start

Hopefully you know what to put in place of smtp.your.provider

smaier · 07-28-2004, 08:48 PM

Well, I tried that and I get the same error message. Now this is in the maillog:

Code:

Jul 28 21:42:00 spacedock sendmail[3214]: i6S076vY002624: to=<smaier1@rochester.rr.com>, ctladdr=<smaier@smaier.net> (500/500), delay=1+01:34:14, xdelay=00:00:20, mailer=relay, pri=3630323, relay=smtp-server.rochester.rr.com, dsn=4.0.0, stat=Deferred: Name server: smtp-server.rochester.rr.com: host name lookup failure

Forgive my sendmail ignorence, but, shouldn't sendmail be able to send email without relaying through my ISP's smtp server? I would much rather send email from my own server as opposed to relaying to my ISP's server which is what I think the SMART_HOST definition is doing.

SheldonPlankton · 07-28-2004, 09:01 PM

Forgive my ignorance too. I am just learning about sendmail myself. I was having a problem where COnnection refused was showing up in my maillog when I tried to send email to my yahoo.com email account but I was able to send email to my work account from my workstation at work.

Hmm ... can you send mail to any other systems?

smaier · 07-28-2004, 09:13 PM

I cannot send to another system.

SheldonPlankton · 07-28-2004, 09:33 PM

try looking here ... this is part of what I have been reading along with the sendmail README files. http://www.redhat.com/support/resour...OWTO/c239.html

smaier · 07-29-2004, 02:19 PM

Ok, I have solved the problem. It appears that my Netgear router was the cause.

/etc/resolv.conf had an entry:

Code:

nameserver 10.96.119.1

10.96.119.1 is the address to my router. I looked up the external DNS server that the router reported as using and inserted that into the /etc/resolv.conf file. Viola!! Email sends out now.