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06-16-2015 05:28 AM
06-16-2015 05:28 AM
mail stopped being delivered when Netw Admi decided to resolve names using DNS
Hi
I need some help, on this, I have a number of hp-ux servers as well as other unix like O.S. servers running and up until now, a simple command like the below, would prompted a particular user to receive an email, so email alerts were configured.
But some how there was a need to change network configuration, and the Net Admins asked us to include in /etc/resolv.conf some entries. Ever since we no longer receive emails from the servers. Is there a way to overcome that?
date | mailx -s "test" xxx.yyyy@zzz.co.vv
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06-16-2015 06:24 AM
06-16-2015 06:24 AM
Re: mail stopped being delivered when Netw Admi decided to resolve names using DNS
What does /var/adm/syslog/mail.log show?
Also, what does the 'mailq' command show?
Those 2 places are always a good place to start when looking for problems with mail.
Also you can do something like:
echo "test" | /usr/sbin/sendmail -v xxx@yyy.com
to see the verbose output from sendmail.
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06-16-2015 07:36 AM
06-16-2015 07:36 AM
Re: mail stopped being delivered when Netw Admi decided to resolve names using DNS
the mail log:
tail var/adm/syslog/mail.log Jun 16 15:28:49 itc01 sm-mta[12516]: t5GCA6jv005406: SYSERR(root): NIS map mail.aliases specified, but NIS not running Jun 16 15:58:54 itc01 sm-mta[14159]: t5GCA6jv005406: SYSERR(root): NIS map mail.aliases specified, but NIS not running Jun 16 16:00:00 itc01 sendmail[14187]: t5GE004l014187: from=root@itc01.mcel.co.mz, size=464, class=0, nrcpts=3, msgid=<201506161400.t5GE004l014187@itc01.mcel.co.mz>, relay=root@localhost Jun 16 16:00:00 itc01 sendmail[14189]: t5GE004l014187: to=jcuvelo@mcel.co.mz,fretagi@mcel.co.mz,amucuna@mcel.co.mz, ctladdr=root@itc01.mcel.co.mz (0/3), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=180464, relay=192.168.1.39, dsn=5.1.2, stat=Host unknown (Name server: 192.168.1.39: host not found) Jun 16 16:00:00 itc01 sendmail[14189]: t5GE004l014187: SYSERR(root): NIS map mail.aliases specified, but NIS not running Jun 16 16:00:00 itc01 sendmail[14189]: t5GE004l014187: t5GE004k014189: DSN: NIS map mail.aliases specified, but NIS not running Jun 16 16:00:00 itc01 sendmail[14189]: t5GE004k014189: to=root@itc01.mcel.co.mz, delay=00:00:00, mailer=local, pri=31830, stat=queued Jun 16 16:25:48 itc01 sendmail[15598]: t5GEPmPx015598: from=root, size=5, class=0, nrcpts=1, msgid=<201506161425.t5GEPmPx015598@itc01.mcel.co.mz>, relay=root@localhost Jun 16 16:25:48 itc01 sendmail[15598]: t5GEPmPx015598: to=fretagi@mcel.co.mz, ctladdr=root (0/3), delay=00:00:00, xdelay=00:00:00, mailer=relay, pri=30005, relay=192.168.1.39, dsn=5.1.2, stat=Host unknown (Name server: 192.168.1.39: host not found) Jun 16 16:25:48 itc01 sendmail[15598]: t5GEPmPx015598: SYSERR(root): NIS map mail.aliases specified, but NIS not running
the mailq:
#mailq /var/spool/mqueue (7 requests) -----Q-ID----- --Size-- -----Q-Time----- ------------Sender/Recipient----------- t5GE004k014189 2369 Tue Jun 16 16:00 MAILER-DAEMON (NIS map mail.aliases specified, but NIS not running) root@itc01.mcel.co.mz t5GCA6jv005406 1525 Tue Jun 16 14:10 MAILER-DAEMON (alias database unavailable) root t5GBSTof003340 1791 Tue Jun 16 13:28 MAILER-DAEMON (alias database unavailable) root t5G70424019654 354 Tue Jun 16 09:00 root (alias database unavailable) root t5G600Bk016878 2440 Tue Jun 16 08:00 MAILER-DAEMON (alias database unavailable) root@itc01.mcel.co.mz t5G4RJof012541 1686 Tue Jun 16 06:27 MAILER-DAEMON (alias database unavailable) root t5G000sB029683 245 Tue Jun 16 02:00 root (alias database unavailable) oracle Total requests: 7
the echo :
/dead.letter... Saved message in /dead.letter
but other systems I have a different output:
tail /var/adm/syslog/mail.log Jan 25 04:57:11 mceldev sendmail[7170]: t0P2R6t06609: SYSERR(root): hash map "Alias0": unsafe map file /etc/mail/aliases.db: Group writable directory Jan 25 04:57:11 mceldev sendmail[7170]: t0P2R6t06609: SYSERR(root): dbm map "Alias0": unsafe map file /etc/mail/aliases: No such file or directory Jan 25 04:57:11 mceldev sendmail[7170]: t0P2R6t06609: SYSERR(root): NIS map mail.aliases specified, but NIS not running Jan 25 04:57:11 mceldev sendmail[7170]: t0P2R6t06609: SYSERR(root): Error writing control file ./tft0P2R6t06609: No space left on device Jan 25 05:27:16 mceldev sendmail[7806]: grew WorkList for /var/spool/mqueue to 2000 Jan 25 05:27:16 mceldev sendmail[7806]: grew WorkList for /var/spool/mqueue to 3000 Jan 25 05:27:16 mceldev sendmail[7806]: t0P2R6t06609: SYSERR(root): hash map "Alias0": unsafe map file /etc/mail/aliases.db: Group writable directory Jan 25 05:27:16 mceldev sendmail[7806]: t0P2R6t06609: SYSERR(root): dbm map "Alias0": unsafe map file /etc/mail/aliases: No such file or directory Jan 25 05:27:16 mceldev sendmail[7806]: t0P2R6t06609: SYSERR(root): NIS map mail.aliases specified, but NIS not running Jan 25 05:27:16 mceldev sendmail[7806]: t0P2R6t06609: queueup: cannot create ./tft0P2R6t06609, uid=0: File exists Jan 25 05:35:02 mceldev sendmail[7806]: t0P2R6t06609: SYSERR(root): Erromceldev[360]/
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06-18-2015 06:47 AM
06-18-2015 06:47 AM
Re: mail stopped being delivered when Netw Admi decided to resolve names using DNS
It looks like you have several issues.
1) relay=192.168.1.39, dsn=5.1.2, stat=Host unknown (Name server: 192.168.1.39: host not found)
This is indicating that the host cannot be found. This could depend on how your name resolution is set up. If you are using only DNS then you may need to change your /etc/nsswitch.conf file so that it can look at both local files and DNS.
2) Jun 16 16:25:48 itc01 sendmail[15598]: t5GEPmPx015598: SYSERR(root): NIS map mail.aliases specified, but NIS not running
It looks like you may have NIS stuff specified in your /etc/nsswitch.conf file. If you do, and you don't have NIS running then that needs to be removed.
3) From the mailq command - (alias database unavailable)
Run the command 'newaliases' on your server to rebuild the /etc/mail/aliases file
Fix all of these and try sending mail again.
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07-03-2015 01:56 AM
07-03-2015 01:56 AM
Re: mail stopped being delivered when Netw Admi decided to resolve names using DNS
my /etc/nsswitch.conf file looks like the following:
cat /etc/nsswitch.conf # # /etc/nsswitch.hp_defaults: # # @(#) # # An example file that could be copied over to /etc/nsswitch.conf; it # uses NIS (YP) in conjunction with files. # passwd: compat group: compat hosts: files dns ipnodes: dns [NOTFOUND=return] nis [NOTFOUND=return] files networks: nis [NOTFOUND=return] files protocols: nis [NOTFOUND=return] files rpc: nis [NOTFOUND=return] files publickey: nis [NOTFOUND=return] files netgroup: nis [NOTFOUND=return] files automount: files nis aliases: files nis services: nis [NOTFOUND=return] files itc01[458]/ #
So I beleive the line "hosts: files dns" is correct
so I dont quite understand why when I run sendmail it returns "save in dead.letter"
sendmail -v fretagi@mydomain.com Hello. . /dead.letter... Saved message in /dead.letter itc01[459]/ #
Please can I have some help?
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07-10-2015 08:26 AM
07-10-2015 08:26 AM
Re: mail stopped being delivered when Netw Admi decided to resolve names using DNS
problem solved , I have put the FQDN of the server DS macro of sendmail.cf file