mail issues

[yaboo]

Hi All

seems, I now have mail issues,after each issue, I know have a new one.

It seems my mail server can't recieve and accept emails. When I try to send emails between users, that does not seem to work .

I have checked the logs in /opt/zimbra/logs, and find nothing stating mail denied etc. I check in /var/log/mail.info and get these errors.

Feb 21 11:59:34 nene postfix/smtp[26025]: CE381D4020: to=, relay=127.0.0.1[127.0.0.1]:10024, delay=80299, delays=80299/0.02/0.01/0, dsn=4.4.2, status=deferred (lost connection with 127.0.0.1[127.0.0.1] while receiving the initial server greeting)
Feb 21 11:59:34 nene postfix/qmgr[4235]: warning: connect to transport retry: No such file or directory
Feb 21 11:59:34 nene postfix/qmgr[4235]: warning: connect to transport retry: No such file or directory
Feb 21 11:59:34 nene postfix/qmgr[4235]: 2E1F1D4095: to=, relay=none, delay=347, delays=347/0.08/0/0, dsn=4.3.0, status=deferred (mail transport unavailable)
Feb 21 11:59:34 nene postfix/qmgr[4235]: 2C281D4087: to=, relay=none, delay=8832, delays=8832/0.09/0/0, dsn=4.3.0, status=deferred (mail transport unavailable)
Feb 21 11:59:34 nene postfix/qmgr[4235]: 244CDD408D: to=, relay=none, delay=4629, delays=4629/0.1/0/0, dsn=4.3.0, status=deferred (mail transport unavailable)
Feb 21 11:59:34 nene postfix/qmgr[4235]: 1691FD4090: to=, relay=none, delay=2264, delays=2264/0.11/0/0, dsn=4.3.0, status=deferred (mail transport unavailable)
Feb 21 11:59:34 nene postfix/qmgr[4235]: DB22AD4091: to=, relay=none, delay=2260, delays=2260/0.12/0/0, dsn=4.3.0, status=deferred (mail transport unavailable)
Feb 21 12:00:04 nene zmmailboxdmgr[26588]: status requested
Feb 21 12:00:04 nene zmmailboxdmgr[26588]: status OK
Feb 21 12:00:38 nene postfix/anvil[19729]: statistics: max connection rate 1/60s for (smtp:78.36.190.42) at Feb 21 11:52:36
Feb 21 12:00:38 nene postfix/anvil[19729]: statistics: max connection count 1 for (smtp:78.36.190.42) at Feb 21 11:52:36
Feb 21 12:00:38 nene postfix/anvil[19729]: statistics: max cache size 2 at Feb 21 11:57:07

Note my zimbra zerver is internal and nat. I have port 25 forwarded. I am able to telnet from the outside and make a connection with the mail server.

Any ideas

Joseph

[yaboo]

Hi Also found this in my /var/log/mail.log

Feb 21 12:20:01 nene postfix/qmgr[4235]: DD1F4D4099: to=, relay=none, delay=1.1, delays=1.1/0/0/0, dsn=4.4.2, status=deferred (delivery temporarily suspended: lost connection with 127.0.0.1[127.0.0.1] while receiving the initial server greeting)

[mmorse]

Originally Posted by yaboo

Note my zimbra zerver is internal and nat. I have port 25 forwarded. I am able to telnet from the outside and make a connection with the mail server.

host `hostname` <--backticks not single quotes
dig any domain.com
your /etc/hosts file
DNS lookups setting?
ie: Have you setup a split-dns at all?
Split DNS - Zimbra :: Wiki
/blog/archives/2007/06/making_zimbra_bind_work_together_1.html

[yaboo]

Hi Mmorse

I do not have a split dns system. the dns resides on my firewall/dsl machine.

My dns and /etc/hosts looks fine.

Joseph

[moquist]

I have the same symptoms that have been described above.

It's possible my server was harshly powered off on July 4th; in any case the problem has occurred only since it was booted again on July 5th.

This is running on Ubuntu Dapper, installed using zcs-5.0.6_GA_2313.UBUNTU6.20080522130240.

/var/log/mail.log is full of this type of thing:
Jul 6 06:37:09 mail postfix/qmgr[14180]: 9554F5E74364: to=, relay=none, delay=2213, delays=2213/0.13/0/0, dsn=4.4.2, status=deferred (delivery temporarily suspended: lost connection with 127.0.0.1[127.0.0.1] while receiving the initial server greeting)

and this type of thing:
Jul 6 09:13:56 mail postfix/qmgr[7365]: ADAA05E743C8: to=, relay=none, delay=0.79, delays=0.38/0.41/0/0, dsn=4.3.0, status=deferred (mail transport unavailable)

my mail transport is:
root@mail:~# zmprov ga moquist@vlacs.org | grep -i trans
zimbraMailTransport: lmtp:mail.vlacs.org:7025

My DNS is fine and connecting to port 7025 works as expected (though I'm not sure about the syntax error):
root@mail:~# dig MX vlacs.org

; <<>> DiG 9.3.2 <<>> MX vlacs.org
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 7333
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 2

;; QUESTION SECTION:
;vlacs.org. IN MX

;; ANSWER SECTION:
vlacs.org. 900 IN MX 10 mail.vlacs.org.

;; AUTHORITY SECTION:
vlacs.org. 900 IN NS ns0.vlacs.org.

;; ADDITIONAL SECTION:
mail.vlacs.org. 900 IN A 10.255.0.3
ns0.vlacs.org. 900 IN A 10.255.0.1

;; Query time: 1 msec
;; SERVER: 10.255.0.1#53(10.255.0.1)
;; WHEN: Sun Jul 6 09:15:28 2008
;; MSG SIZE rcvd: 98

root@mail:~# dig mail.vlacs.org

; <<>> DiG 9.3.2 <<>> mail.vlacs.org
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 15823
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 1, ADDITIONAL: 1

;; QUESTION SECTION:
;mail.vlacs.org. IN A

;; ANSWER SECTION:
mail.vlacs.org. 900 IN A 10.255.0.3

;; AUTHORITY SECTION:
vlacs.org. 900 IN NS ns0.vlacs.org.

;; ADDITIONAL SECTION:
ns0.vlacs.org. 900 IN A 10.255.0.1

;; Query time: 2 msec
;; SERVER: 10.255.0.1#53(10.255.0.1)
;; WHEN: Sun Jul 6 09:15:33 2008
;; MSG SIZE rcvd: 82

root@mail:~# telnet mail.vlacs.org 7025
Trying 127.0.1.1...
Connected to mail.vlacs.org.
Escape character is '^]'.
220 mail.vlacs.org Zimbra LMTP ready
helo there
500 5.5.2 Syntax error
^]
telnet> quit
Connection closed.

Following the instructions in another forum discussion, I added the following two lines to /etc/security/limits.conf:
soft nofile 65535
hard nofile 65535
...though just now I took them back out (and rebooted again) because these lines immediately followed, and because nothing had improved:
# End of file
zimbra soft nofile 524288
zimbra hard nofile 524288

Thanks for any advice you can provide.

--matt

[moquist]

I think I figured out my own problem. A few weeks ago I was messing around with different port forward options and dropped the following into a startup script:

/sbin/iptables -t nat -A PREROUTING -p tcp --dport 10025 -j DNAT --to-destination 127.0.0.1:25
/sbin/iptables -t nat -A POSTROUTING -j MASQUERADE

Then when the system got rebooted, the rules were applied and things went haywire. *doh*

I removed the startup script and rebooted (just to really make sure everything was reinitialized properly) and my server has been chugging away for ~1 hour now processing all the deferred mail. Yeesh!

Cheers,
Matt