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<DIV><FONT face=Arial size=2><SPAN
class=698171804-23122004>Hi,</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=698171804-23122004></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=698171804-23122004>I am using
Check_smtp to check mail service.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=698171804-23122004></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=698171804-23122004>Anyone knows how
check_smtp works?</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=698171804-23122004></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=698171804-23122004>When I use the
internal IP address, I get 0 sec response, which returns a critical warning in
the web.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=698171804-23122004>./check_smtp -H
192.168.250.10 -t 4<BR>SMTP OK - 0 second response time<BR>Socket timeout after
4 seconds</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=698171804-23122004></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=698171804-23122004>But when I use
external IP address, it is ok.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN class=698171804-23122004>./check_smtp -H
202.61.212.25 -v<BR>SMTP OK - 0 sec. response time, 220 itumailsrv.itu.local
Microsoft ESMTP MAIL Service, Version: 6.0.3790.0 ready at Thu, 23 Dec
2004 15:03:51 +1100</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=698171804-23122004></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=698171804-23122004>I dont know what is
socket timeout means?</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=698171804-23122004></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=698171804-23122004>If I use telnet
192.168.250.10 25, I can see the smtp service is ready. And I can ping
192.168.250.10 without problem.</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=698171804-23122004></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=698171804-23122004>Can anybody explaain
it to me?</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=698171804-23122004></SPAN></FONT> </DIV>
<DIV><FONT face=Arial size=2><SPAN class=698171804-23122004>Thanks a
lot,</SPAN></FONT></DIV>
<DIV><FONT face=Arial size=2><SPAN
class=698171804-23122004>Lydia</SPAN></FONT></DIV></BODY></HTML>