Share your knowledge at the LQ Wiki.
Go Back > Forums > Linux Forums > Linux - Newbie
User Name
Linux - Newbie This Linux forum is for members that are new to Linux.
Just starting out and have a question? If it is not in the man pages or the how-to's this is the place!


  Search this Thread
Old 08-27-2005, 01:09 AM   #1
LQ Newbie
Registered: Apr 2005
Posts: 6

Rep: Reputation: 0
Question Problem sending nonlocal mails in sendmail

I have problem sending outgoing mails from my system. Here is wat i got...

[root@localhost mail]# mail j@anyotherhost.anyotherdomain
Subject: eeeeeeeee
Cc: j@localhost

And the entries i found in /var/log/maillog

Aug 27 11:24:09 localhost sendmail[2819]: j7RGO7TU002819: to=j@localhost.localdomain, j@anyotherhost.anyotherdomain, ctladdr=root (0/0), delay=00:00:02, xdelay=00:00:01, mailer=relay, pri=60077, relay=[] [], dsn=2.0.0, stat=Sent (j7RGO8Tb002821 Message accepted for delivery)
Aug 27 11:24:09 localhost sendmail[2822]: j7RGO8Tb002821: to=<j@localhost.localdomain>, ctladdr=<root@localhost.localdomain> (0/0), delay=00:00:01, xdelay=00:00:00, mailer=local, pri=60559, dsn=2.0.0, stat=Sent
Aug 27 11:31:10 localhost sendmail[2822]: j7RGO8Tb002821: to=< j@anyotherhost.anyotherdomain>, ctladdr=<root@localhost.localdomain> (0/0), delay=00:07:02, xdelay=00:07:01, mailer=esmtp, pri=60559, [], dsn=4.0.0, stat=Deferred: Connection timed out with

---same problem is with any other domains---

my sendmail configuration files found in /etc/mail
# /etc/mail/access

localhost.localdomain RELAY
localhost RELAY RELAY

# local-host-names



dnl #
dnl # This is the sendmail macro config file for m4. If you make changes to
dnl # /etc/mail/, you will need to regenerate the
dnl # /etc/mail/ file by confirming that the sendmail-cf package is
dnl # installed and then performing a
dnl #
dnl # make -C /etc/mail
dnl #
VERSIONID(`setup for Red Hat 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 #
dnl define(`confAUTO_REBUILD')dnl
define(`confTO_CONNECT', `1m')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 #
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(`mailertable',`hash -o /etc/mail/mailertable.db')dnl
FEATURE(`virtusertable',`hash -o /etc/mail/virtusertable.db')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
dnl #
dnl # The following causes sendmail to only listen on the IPv4 loopback address
dnl # 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,Addr=, 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 #
dnl #
dnl FEATURE(`relay_based_on_MX')dnl
dnl #
dnl # Also accept email sent to "localhost.localdomain" as local email.
dnl #
dnl #
dnl # The following example makes mail from this host and any additional
dnl # specified domains appear to be sent from
dnl #
dnl MASQUERADE_AS(`')dnl
dnl #
dnl # masquerade not just the headers, but the envelope as well
dnl #
dnl FEATURE(masquerade_envelope)dnl
dnl #
dnl # masquerade not just, but @* as well
dnl #
dnl FEATURE(masquerade_entire_domain)dnl
dnl #
dnl MASQUERADE_DOMAIN(localhost)dnl
dnl MASQUERADE_DOMAIN(localhost.localdomain)dnl
dnl MASQUERADE_DOMAIN(mydomain.lan)dnl


Do i need any configuration files in the configuration files.

Thanks in advance.
Old 08-27-2005, 01:45 AM   #2
LQ Newbie
Registered: Apr 2005
Posts: 6

Original Poster
Rep: Reputation: 0
My system is Red Hat Enterprise Linux WS Release 3
Kernel 2.4.21-4.EL on i686

And the sendmail configurations are the defaults from the installation.
Old 08-27-2005, 01:48 AM   #3
Pete M
Registered: Aug 2003
Location: UK
Distribution: Redhat 9 FC 3 SUSE 9.2 SUSE 9.3 Gentoo 2005.0 Debian Sid
Posts: 657

Rep: Reputation: 32

To send mail out to the net you need a FQDN (fully qualified domain name)

localhost.localdomain won't work, that's why google rejects it

Old 08-29-2005, 02:23 AM   #4
LQ Newbie
Registered: Apr 2005
Posts: 6

Original Poster
Rep: Reputation: 0
So sendmail is useless in a system with no FQDM to send mail thru internet.

Any way to circumvent that...

Do those 'MASQUERADE' lines in the '' file would become handy ?
Old 08-29-2005, 02:57 AM   #5
Pete M
Registered: Aug 2003
Location: UK
Distribution: Redhat 9 FC 3 SUSE 9.2 SUSE 9.3 Gentoo 2005.0 Debian Sid
Posts: 657

Rep: Reputation: 32

The problem is'nt just sendmail, it applies to any mail server

Most mail servers check the origin of the mail via DNS if you use "MASQUERADE" say your IP will not resolve to the domain so the mail will be rejected as spam

Another point is no one will be able to reply to your mail

You could try "SMART HOST" and send mail through your ISP mail server, but once again if you use a made up domain this may well be considered as spam and be frowned upon



Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Sending e-mails via a C++ program The_Nerd Programming 6 12-05-2004 09:56 PM
Sending mails using port 25 rabeea Linux - Security 10 08-16-2004 11:53 PM
qmail not sending mails spank Linux - Software 0 05-21-2004 12:08 PM
Sending mails with eXtremail Ivanhoe Linux - Networking 2 12-31-2002 09:34 AM
sendmail sending fake e-mails klaus geld Linux - Security 4 07-18-2001 08:45 AM > Forums > Linux Forums > Linux - Newbie

All times are GMT -5. The time now is 10:40 AM.

Main Menu
Write for LQ is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration