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Old 06-09-2008, 01:03 PM
Ray Leventhal
 
Default sendmail not sending after reboot

HI folks,

I've an up-to-date CentOS 5.x box on a small intranet (<20 users).

We did a reboot over the weekend and all appears well except that
clients on the LAN can no longer send email. Just hangs/times out. No
clear identifiers in the /var/log/maillog or /var/log/messages.


We're not setup for ESMTP as it's a closed network and I'm really hoping
for a kickstart as to where to look to get this going.


In case it helps, my sendmail.cf file is below.

Thanks in advance.
-R

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 linux')dnl
OSTYPE(`linux')dnl
dnl #
dnl # Do not advertize sendmail version.
dnl #
dnl define(`confSMTP_LOGIN_MSG', `$j Sendmail; $b')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
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 # cd /usr/share/ssl/certs; make sendmail.pem
dnl # Complete usage:
dnl # make -C /usr/share/ssl/certs usage
dnl #
dnl define(`confCACERT_PATH', `/etc/pki/tls/certs')dnl
dnl define(`confCACERT', `/etc/pki/tls/certs/ca-bundle.crt')dnl
dnl define(`confSERVER_CERT', `/etc/pki/tls/certs/sendmail.pem')dnl
dnl define(`confSERVER_KEY', `/etc/pki/tls/certs/sendmail.pem')dnl
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 following limits the number of processes sendmail can fork to
accept
dnl # incoming messages or process its message queues to 20.) sendmail
refuses
dnl # to accept connections once it has reached its quota of child
processes.

dnl #
dnl define(`confMAX_DAEMON_CHILDREN', `20')dnl
dnl #
dnl # Limits the number of new connections per second. This caps the
overhead

dnl # incurred due to forking new sendmail processes. May be useful against
dnl # DoS attacks or barrages of spam. (As mentioned below, a per-IP
address
dnl # limit would be useful but is not available as an option at this
writing.)

dnl #
dnl define(`confCONNECTION_RATE_THROTTLE', `3')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 # For using Cyrus-IMAPd as POP3/IMAP server through LMTP delivery
uncomment
dnl # the following 2 definitions and activate below in the MAILER
section the

dnl # cyrusv2 mailer.
dnl #
dnl define(`confLOCAL_MAILER', `cyrusv2')dnl
dnl define(`CYRUSV2_MAILER_ARGS', `FILE /var/lib/imap/socket/lmtp')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,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 #
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
dnl MAILER(cyrusv2)dnl
DAEMON_OPTIONS(`Name=smtp,Modifiers=b')

_______________________________________________
CentOS mailing list
CentOS@centos.org
http://lists.centos.org/mailman/listinfo/centos
 
Old 06-09-2008, 01:08 PM
Ray Leventhal
 
Default sendmail not sending after reboot

Ray Leventhal wrote:

HI folks,

I've an up-to-date CentOS 5.x box on a small intranet (<20 users).

We did a reboot over the weekend and all appears well except that
clients on the LAN can no longer send email. Just hangs/times out.
No clear identifiers in the /var/log/maillog or /var/log/messages.


We're not setup for ESMTP as it's a closed network and I'm really
hoping for a kickstart as to where to look to get this going.


In case it helps, my sendmail.cf file is below.

Thanks in advance.
-R

<snip>
I should add that sendmail is definitely running . I can telnet to
the box on port 25 and get a reply, and "service sendmail status"
returns 'running' with at least one pid.

_______________________________________________
CentOS mailing list
CentOS@centos.org
http://lists.centos.org/mailman/listinfo/centos
 
Old 06-09-2008, 01:22 PM
lingu
 
Default sendmail not sending after reboot

HI,


* Check the below things on your server.


1) diskspace

2) mailq

3) netstat -ntlp |grep :25 |grep tcp

4) telnet on* port 25 from server as well as from client

5) ps auxxww |grep sendmail


################you should get output like below###########################
root****** 794* 0.0* 0.0* 4320* 648 pts/2*** S+** 13:13** 0:00 grep sendmail
root**** 21186* 0.0* 0.2 10876 2156 ?******* Ss** May23** 0:00 sendmail: accepting connections

smmsp*** 21195* 0.0* 0.1* 8192 1636 ?******* Ss** May23** 0:00 sendmail: Queue runner@01:00:00 for /var/spool/clientmqueue
################################################## ######################

5) check maillog properly definitely it will throw some* messages


6) check /var/log/messages .



* Check* the maillog otherwise increase the sendmail loglevel in the sendmail.mc file to 10 and restart sendmail.





Line to be changed in sendmail.mc to increase log level.


dnl define(`confLOG_LEVEL', `9')dnl



Regards
lingu

On Mon, Jun 9, 2008 at 6:33 PM, Ray Leventhal <centos@swhi.net> wrote:

HI folks,



I've an up-to-date CentOS 5.x box on a small intranet (<20 users).



We did a reboot over the weekend and all appears well except that clients on the LAN can no longer send email. *Just hangs/times out. *No clear identifiers in the /var/log/maillog or /var/log/messages.



We're not setup for ESMTP as it's a closed network and I'm really hoping for a kickstart as to where to look to get this going.



In case it helps, my sendmail.cf file is below.



Thanks in advance.

-R



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 linux')dnl

OSTYPE(`linux')dnl

dnl #

dnl # Do not advertize sendmail version.

dnl #

dnl define(`confSMTP_LOGIN_MSG', `$j Sendmail; $b')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

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 # * * cd /usr/share/ssl/certs; make sendmail.pem

dnl # Complete usage:

dnl # * * make -C /usr/share/ssl/certs usage

dnl #

dnl define(`confCACERT_PATH', `/etc/pki/tls/certs')dnl

dnl define(`confCACERT', `/etc/pki/tls/certs/ca-bundle.crt')dnl

dnl define(`confSERVER_CERT', `/etc/pki/tls/certs/sendmail.pem')dnl

dnl define(`confSERVER_KEY', `/etc/pki/tls/certs/sendmail.pem')dnl

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 following limits the number of processes sendmail can fork to accept

dnl # incoming messages or process its message queues to 20.) sendmail refuses

dnl # to accept connections once it has reached its quota of child processes.

dnl #

dnl define(`confMAX_DAEMON_CHILDREN', `20')dnl

dnl #

dnl # Limits the number of new connections per second. This caps the overhead

dnl # incurred due to forking new sendmail processes. May be useful against

dnl # DoS attacks or barrages of spam. (As mentioned below, a per-IP address

dnl # limit would be useful but is not available as an option at this writing.)

dnl #

dnl define(`confCONNECTION_RATE_THROTTLE', `3')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 # For using Cyrus-IMAPd as POP3/IMAP server through LMTP delivery uncomment

dnl # the following 2 definitions and activate below in the MAILER section the

dnl # cyrusv2 mailer.

dnl #

dnl define(`confLOCAL_MAILER', `cyrusv2')dnl

dnl define(`CYRUSV2_MAILER_ARGS', `FILE /var/lib/imap/socket/lmtp')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,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 #

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

dnl MAILER(cyrusv2)dnl

DAEMON_OPTIONS(`Name=smtp,Modifiers=b')



_______________________________________________

CentOS mailing list

CentOS@centos.org

http://lists.centos.org/mailman/listinfo/centos



_______________________________________________
CentOS mailing list
CentOS@centos.org
http://lists.centos.org/mailman/listinfo/centos
 
Old 06-09-2008, 01:29 PM
Ray Leventhal
 
Default sendmail not sending after reboot

Ray Leventhal wrote:

HI folks,

I've an up-to-date CentOS 5.x box on a small intranet (<20 users).

We did a reboot over the weekend and all appears well except that
clients on the LAN can no longer send email. Just hangs/times out.
No clear identifiers in the /var/log/maillog or /var/log/messages.

inserted update:
It does appear there's something in /var/log/maillog. I found this
entry, repeated a few times for users (now that they're here and using
the system).


Jun 9 09:10:49 gungho sendmail[13074]: m59D9b47013074: lost input
channel from [172.16.0.155] to smtp after mail


We're not setup for ESMTP as it's a closed network and I'm really
hoping for a kickstart as to where to look to get this going.


In case it helps, my sendmail.cf file is below.

Thanks in advance.
-R
<snip>


_______________________________________________
CentOS mailing list
CentOS@centos.org
http://lists.centos.org/mailman/listinfo/centos
 
Old 06-09-2008, 01:42 PM
Ray Leventhal
 
Default sendmail not sending after reboot

lingu wrote:
Hi lingu,
Thanks for your reply.

Check the below things on your server.

1) diskspace

df -h shows 253GB free on the LVM which holds mail


2) mailq

mailq says 'mailqueue is empty'


3) netstat -ntlp |grep :25 |grep tcp

# netstat -ntlp|grep :25|grep tcp
tcp 0 0 0.0.0.0:25
0.0.0.0:* LISTEN 12861/sendmail: acc


4) telnet on port 25 from server as well as from client

connects with the following, from either server or lan client:
220 gungho.prvnet ESMTP Sendmail 8.13.8/8.13.8; Mon, 9 Jun 2008 09:27:59
-0400




5) ps auxxww |grep sendmail
###############################################

# ps auxwww|grep sendmail
root 12861 0.0 0.2 8960 1920 ? Ss 08:42 0:00
sendmail: accepting connections
smmsp 12869 0.0 0.1 8012 1484 ? Ss 08:42 0:00
sendmail: Queue runner@01:00:00 for /var/spool/clientmqueue
root 13249 0.0 0.0 3892 688 pts/2 S+ 09:28 0:00 grep
sendmail




5) check maillog properly definitely it will throw some messages

The only interesting thing here is:
Jun 9 09:10:49 gungho sendmail[13074]: m59D9b47013074: lost input
channel from [172.16.0.155] to smtp after mail


6) check /var/log/messages .

nothing unusual in the messages file.



Check the maillog otherwise increase the sendmail loglevel in the
sendmail.mc <http://sendmail.mc> file to 10 and restart sendmail.


Line to be changed in sendmail.mc <http://sendmail.mc> to increase log
level.


dnl define(`confLOG_LEVEL', `9')dnl

done. I'll re-check logs now as well.


Regards
lingu

Thanks for your suggestions. I'll reply with status shortly
-Ray
_______________________________________________
CentOS mailing list
CentOS@centos.org
http://lists.centos.org/mailman/listinfo/centos
 
Old 06-09-2008, 01:48 PM
Ray Leventhal
 
Default sendmail not sending after reboot

no change in connection to the mail server. clients connect, but time out.

increase in the log level produced lines like this in /var/log/maillog:
Jun 9 09:28:51 gungho sendmail[13243]: m59DRxV2013243: gungho
[172.16.0.106] did not issue MAIL/EXPN/VRFY/ETRN during connection to smtp


172.16.0.106 is the server address

-Ray
_______________________________________________
CentOS mailing list
CentOS@centos.org
http://lists.centos.org/mailman/listinfo/centos
 
Old 06-09-2008, 03:18 PM
Kai Schaetzl
 
Default sendmail not sending after reboot

Ray Leventhal wrote on Mon, 09 Jun 2008 09:48:22 -0400:

> increase in the log level produced lines like this in /var/log/maillog:
> Jun 9 09:28:51 gungho sendmail[13243]: m59DRxV2013243: gungho
> [172.16.0.106] did not issue MAIL/EXPN/VRFY/ETRN during connection to smtp
>
> 172.16.0.106 is the server address

so, it's a connection to itself. was this a test to localhost?
If not, that hints in the direction of the problem.
Maybe you accidentally set the smarthost to itself or so?
I'd try a manual connect and walk thru an SMTP conversation and send a mail.
Also, clients can produce debug log files, too, even Microsoft products ....

Kai

--
Kai Schätzl, Berlin, Germany
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Old 06-09-2008, 03:42 PM
Ray Leventhal
 
Default sendmail not sending after reboot

Kai Schaetzl wrote:

so, it's a connection to itself. was this a test to localhost?
If not, that hints in the direction of the problem.
Maybe you accidentally set the smarthost to itself or so?
I'd try a manual connect and walk thru an SMTP conversation and send a mail.
Also, clients can produce debug log files, too, even Microsoft products ....

Kai




Hi Kai,

Thanks for your reply. Yes, that one was a connection to itself...but
the msg remains when connecting from a client. My last post must have
crossed with yours.
It now appears to be nothing more than a server timeout issue which is
very strange as this server's load averages are /always/ < .10.

I'm not sure what might have changed since the reboot on Sunday
morning....am now looking at what is or is not running against the
snapshot taken on Friday night.
Do you think it's wise to replace the sendmail.cf and sendmail.mc files
from the snapshot (after backing them up, of course)?


-Ray
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Old 06-09-2008, 04:59 PM
Kai Schaetzl
 
Default sendmail not sending after reboot

Ray Leventhal wrote on Mon, 09 Jun 2008 11:42:27 -0400:

> Do you think it's wise to replace the sendmail.cf and sendmail.mc files
> from the snapshot (after backing them up, of course)?

If you did not change the files: no. As I said: go thru a manual send and
check *where* the timeout occurs (better: repeat it a few times to be sure
it's always in the same phase). The messages in the logs are not very
clear about this. If your users have to authenticate before sending this
could be a typical point-of-failure where after the reboot the
authentication against an external mechanism is somehow hampered. I guess,
you do have any spam protection on the machine as you said it's not taking
external mail?

Kai

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Old 06-09-2008, 05:15 PM
Scott Silva
 
Default sendmail not sending after reboot

on 6-9-2008 6:03 AM Ray Leventhal spake the following:

HI folks,

I've an up-to-date CentOS 5.x box on a small intranet (<20 users).

We did a reboot over the weekend and all appears well except that
clients on the LAN can no longer send email. Just hangs/times out. No
clear identifiers in the /var/log/maillog or /var/log/messages.


We're not setup for ESMTP as it's a closed network and I'm really hoping
for a kickstart as to where to look to get this going.


In case it helps, my sendmail.cf file is below.

Thanks in advance.
-R

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 linux')dnl
OSTYPE(`linux')dnl
dnl #
dnl # Do not advertize sendmail version.
dnl #
dnl define(`confSMTP_LOGIN_MSG', `$j Sendmail; $b')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
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 # cd /usr/share/ssl/certs; make sendmail.pem
dnl # Complete usage:
dnl # make -C /usr/share/ssl/certs usage
dnl #
dnl define(`confCACERT_PATH', `/etc/pki/tls/certs')dnl
dnl define(`confCACERT', `/etc/pki/tls/certs/ca-bundle.crt')dnl
dnl define(`confSERVER_CERT', `/etc/pki/tls/certs/sendmail.pem')dnl
dnl define(`confSERVER_KEY', `/etc/pki/tls/certs/sendmail.pem')dnl
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 following limits the number of processes sendmail can fork to
accept
dnl # incoming messages or process its message queues to 20.) sendmail
refuses
dnl # to accept connections once it has reached its quota of child
processes.

dnl #
dnl define(`confMAX_DAEMON_CHILDREN', `20')dnl
dnl #
dnl # Limits the number of new connections per second. This caps the
overhead

dnl # incurred due to forking new sendmail processes. May be useful against
dnl # DoS attacks or barrages of spam. (As mentioned below, a per-IP
address
dnl # limit would be useful but is not available as an option at this
writing.)

dnl #
dnl define(`confCONNECTION_RATE_THROTTLE', `3')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 # For using Cyrus-IMAPd as POP3/IMAP server through LMTP delivery
uncomment
dnl # the following 2 definitions and activate below in the MAILER
section the

dnl # cyrusv2 mailer.
dnl #
dnl define(`confLOCAL_MAILER', `cyrusv2')dnl
dnl define(`CYRUSV2_MAILER_ARGS', `FILE /var/lib/imap/socket/lmtp')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,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 #
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
dnl MAILER(cyrusv2)dnl
DAEMON_OPTIONS(`Name=smtp,Modifiers=b')

All your Daemon_options (`port... definitions are turned off (dnl).
You have effectively told sendmail to not listen to anybody.
At a minimum you need "DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')"
turned on for local mail to move, or "DAEMON_OPTIONS(`Port=smtp, Name=MTA')"
to listen to all interfaces.


--
MailScanner is like deodorant...
You hope everybody uses it, and
you notice quickly if they don't!!!!

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