Batch file to send email notification

I need to create a batch file that runs every half hour or 1 hour on specific file (log file) and if it sees same timestamp on more than 20 lines it should send email notification. We have smtp service installed on the server. Appreciate if anybody help on this...

for example, timestamp shows something like this in the log file:

[6/12/09 0:07:09:920 EDT] 0000031b SystemOut     O MY_PROTO is
[6/12/09 0:07:09:920 EDT] 0000031b SystemOut     O PLATFORM is qa
[6/12/09 0:07:09:920 EDT] 0000031b SystemOut     O MY_HOST is abc.ac.tx.anet
[6/12/09 0:07:09:920 EDT] 0000031b SystemOut     O MY_PORT is 389
[6/12/09 0:07:09:920 EDT] 0000031b SystemOut     O MY_USER is
[6/12/09 0:07:09:920 EDT] 0000031b SystemOut     O MY_PASS is avcfE
[6/12/09 0:07:09:920 EDT] 0000031b SystemOut     O MY_PROTO is ldap://
[6/12/09 0:07:09:920 EDT] 0000031b SystemOut     O PLATFORM is prod
[6/12/09 0:07:09:920 EDT] 0000031b SystemOut     O MY_HOST is abc.ac.tx.anet
[6/12/09 0:07:09:920 EDT] 0000031b SystemOut     O MY_PORT is 389

download blat (for sending email) and gawk for windows

Code: [Select]

{
 timestamp[$1,$2,$3]++
 }
END{
  for ( i in timestamp){
if (timestamp[i] >= 20) {
print "timestamp more than 20: ",i > "newfile.txt"
}
}
}
save the above as myscript.awk and on command line

Code: [Select]

c:\test> gawk.exe -f myscript.awk
c:\test> blat newfile.txt -to somewhere@some.com


Thanks for the quick response.
can you please send me the batch file that i need to scheduled on Windows server?

Where can i specify the name of the log file in the code you sent?