Experts,
I got the log on /var/log/maillog;
Aug 12 14:05:25 hotman01 sendmail[5887]: p7C65OkJ005887: to=13245@corp.ds.hotpot.com, ctladdr=MonAgt (14442/14442), delay=00:00:01, xdelay=00:00:01, mailer=relay, pri=33499, relay=[127.0.0.1] [127.0.0.1], dsn=2.0.0, stat=Sent (p7C65OcT005888 Message accepted for delivery)
Aug 12 14:05:27 hotman01 sendmail[5890]: STARTTLS=client, relay=pwn00110.hotpot.com., version=TLSv1/SSLv3, verify=FAIL, cipher=AES128-SHA, bits=128/128
Aug 12 14:05:33 hotman01 sendmail[5890]: p7C65OcT005888: to=<13245@corp.ds.hotpot.com>, delay=00:00:09, xdelay=00:00:08, mailer=esmtp, pri=123824, relay=pwn00110.corp.ds.hotpot.com. [163.11.28.96], dsn=5.0.0, stat=Service unavailable
Aug 12 14:05:33 hotman01 sendmail[5890]: p7C65OcT005888: to=<MonAgt@hotman01.apac.hotpot.com>, delay=00:00:09, mailer=local, pri=123824, dsn=5.1.1, stat=User unknown
Aug 12 14:05:33 hotman01 sendmail[5890]: p7C65OcT005888: p7C65XcT005890: postmaster notify: User unknown
Aug 12 14:05:33 hotman01 sendmail[5890]: p7C65XcT005890: to=root, delay=00:00:00, xdelay=00:00:00, mailer=local, pri=35083, dsn=2.0.0, stat=Sent
So in this case, I did the commands on the server <hotman01>;Check below
[root@hotman01 ~]# dig pwn00110.corp.ds.hotpot.com
; <<>> DiG 9.2.4 <<>> pwn00110.corp.ds.hotpot.com
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 32466
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 4, ADDITIONAL: 4
;; QUESTION SECTION:
;pwn00110.corp.ds.hotpot.com. IN A
;; ANSWER SECTION:
pwn00110.corp.ds.hotpot.com. 444 IN A 163.11.28.96
;; AUTHORITY SECTION:
ds.hotpot.com. 7660 IN NS land.hotpot.com.
ds.hotpot.com. 7660 IN NS mempdsd01.ds.hotpot.com.
ds.hotpot.com. 7660 IN NS mempdsd02.ds.hotpot.com.
ds.hotpot.com. 7660 IN NS kate.hotpot.com.
;; ADDITIONAL SECTION:
kate.hotpot.com. 6353 IN A 199.21.122.13
land.hotpot.com. 6353 IN A 199.21.135.8
mempdsd01.ds.hotpot.com. 1378 IN A 199.22.52.4
mempdsd02.ds.hotpot.com. 460 IN A 199.22.52.5
;; Query time: 287 msec
;; SERVER: 155.161.222.18#53(155.161.222.18)
;; WHEN: Fri Aug 19 05:21:41 2011
;; MSG SIZE rcvd: 210
[root@hotman01 ~]# dig -t mx corp.ds.hotpot.com
; <<>> DiG 9.2.4 <<>> -t mx corp.ds.hotpot.com
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 46904
;; flags: qr rd ra; QUERY: 1, ANSWER: 10, AUTHORITY: 4, ADDITIONAL: 6
;; QUESTION SECTION:
;corp.ds.hotpot.com. IN MX
;; ANSWER SECTION:
corp.ds.hotpot.com. 1800 IN MX 100 pwn00110.corp.ds.hotpot.com.
corp.ds.hotpot.com. 1800 IN MX 100 pwn00111.corp.ds.hotpot.com.
corp.ds.hotpot.com. 1800 IN MX 100 pwn00112.corp.ds.hotpot.com.
corp.ds.hotpot.com. 1800 IN MX 100 pwn00113.corp.ds.hotpot.com.
corp.ds.hotpot.com. 1800 IN MX 200 cosexec01v.corp.ds.hotpot.com.
corp.ds.hotpot.com. 1800 IN MX 250 smtp.zmd.hotpot.com.
corp.ds.hotpot.com. 1800 IN MX 300 smtp.dmz.hotpot.com.
;; AUTHORITY SECTION:
ds.hotpot.com. 8699 IN NS mempdsd01.ds.hotpot.com.
ds.hotpot.com. 8699 IN NS mempdsd02.ds.hotpot.com.
ds.hotpot.com. 8699 IN NS kate.hotpot.com.
ds.hotpot.com. 8699 IN NS land.hotpot.com.
;; ADDITIONAL SECTION:
kate.hotpot.com. 7392 IN A 199.21.122.13
land.hotpot.com. 7392 IN A 199.21.135.8
mempdsd01.ds.hotpot.com. 2417 IN A 199.22.52.4
mempdsd02.ds.hotpot.com. 1499 IN A 199.22.52.5
;; Query time: 528 msec
;; SERVER: 155.161.222.18#53(155.161.222.18)
;; WHEN: Fri Aug 19 05:04:22 2011
;; MSG SIZE rcvd: 478
And the contents in /etc/resolv.conf is below: nameserver 155.161.222.18
domain apac.hotpot.com
search apac.hotpot.com network.hotpot.com corp.hotpot.com
Actually the problem is our mail group(team@corp.ds.hotpot.com) is unable to receive the emails from
MonAgt@hotman01.apac.hotpot.com. So in view of above, what do you think the root cause is?
Hope get your helps...
