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Doug Hardie wrote:

>
> sendmail -q
>
> Depending on how your environment is setup you may have specify the full 
path to sendmail.


I just tried sendmail -q, I don't know why I still have "host name lookup 
failure" problem.

AFAIK the hostnames' ip address should be cached for furture reference, so, 
say I lookup hotmail.com, if I access hotmail.com right after that lookup, 
my box should use the cached ip address without lookup DNS again.

Here is what I did:

#nslookup hotmail.com; sendmail -v -q
Server:  modem.realss
Address:  10.0.0.138

Non-authoritative answer:
Name:    hotmail.com
Addresses:  64.4.33.7, 64.4.52.7, 64.4.32.7


Running /var/spool/mqueue/hBB4UpWD050471 (sequence 1 of 8)
<alvaro@alobbs.com>... Deferred: Name server: alobbs.com.: host name lookup 
failure

Running /var/spool/mqueue/hBB4mcWD050542 (sequence 2 of 8)
<spacenet@xmu.edu.cn>... Deferred: Name server: xmu.edu.cn.: host name 
lookup failure

Running /var/spool/mqueue/hBB4oqWD050549 (sequence 3 of 8)
<boman@xmu.edu.cn>... Deferred: Name server: xmu.edu.cn.: host name lookup 
failure

Running /var/spool/mqueue/hBB3h5WD009741 (sequence 4 of 8)
<qiaqiajuan@hotmail.com>... Deferred: Name server: hotmail.com.: host name 
lookup failure

Running /var/spool/mqueue/hB9KvAi4002520 (sequence 5 of 8)
<weiwuzhang@hotmail.com>... Deferred: Name server: hotmail.com.: host name 
lookup failure

Running /var/spool/mqueue/hB9KvAi5002520 (sequence 6 of 8)
<weiwuzhang@hotmail.com>... Deferred: Name server: hotmail.com.: host name 
lookup failure

Running /var/spool/mqueue/hB9Gbhi3001046 (sequence 7 of 8)
<egroupware-developers@lists.sourceforge.net>... Deferred: Name server: 
lists.sourceforge.net.: host name lookup failure

Running /var/spool/mqueue/hB9Gdti3001049 (sequence 8 of 8)
<lars@kneschke.de>... Deferred: Name server: kneschke.de.: host name lookup 
failure

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