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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Hi,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>The monitoring software I use - nagios is
capable of this, without going into too much detail its basically a monitoring
tool that can run on a webserver and then check the status of software such as
your mta remotely aswell as executing local scripts on each mailscanner server
to check queue sizes and report back to the nagios monitoring server via the nagios
nrpe plugin, which can be configured to alert via email or even sms once
certain thresholds (e.g queue size) are met. <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>In our setup I wrote my own queue size
monitor script but there are nrpe scripts already created for various MTA’s
out there.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Al<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
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</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
mailscanner-bounces@lists.mailscanner.info
[mailto:mailscanner-bounces@lists.mailscanner.info] <b><span style='font-weight:
bold'>On Behalf Of </span></b>Jonas A. Larsen<br>
<b><span style='font-weight:bold'>Sent:</span></b> 09 July 2007 11:04<br>
<b><span style='font-weight:bold'>To:</span></b>
mailscanner@lists.mailscanner.info<br>
<b><span style='font-weight:bold'>Subject:</span></b> How to monitor the health
of the MailScanner architecture</span></font><font size=3 face="Times New Roman"><span
style='font-size:12.0pt;font-family:"Times New Roman"'><o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>Hello
all<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>I
have a problem, and discussing it on the irc channel didn’t turn up any
obvious solution.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>Say
you have more than 1 MS box scanning mails for a specific domain. They are load
balanced in some way, so the load is split over the servers.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>Now
lets say one of the servers have a problem. Not a fatal problem, so the server
is still running (responds to pings etc) port 25 is still open, and exim (the
mta in my case) still accepts mails.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>But
for some reason, crash, corrupt config, full root fs etc. the process of moving
mails from the incoming queue to the outgoing queue is not working.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>What
I am interested in, is a system to alert me of such a problem automatically.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>Currently
the only thing, besides clients noticing mail being delayed, is for me to look
at my mailscaner-mrtg graphs for the incoming queue and notice that its
growing.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>One
method of doing all this automatically that we came up with, would be some
complex system that would work as follows:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>You
create a domain for each MailScanner, that only that MailScanner scans for.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>You
then create an imap account on another system for each of the domains.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>You
then create a script that sends a mail to each of the accounts and after X
amount of minutes check to see if the mail has arrived on the imap account. If
yes, delete the mail and do the same thing again after Y amount of minutes (a
cron job), if it doesn’t exist something must be wrong with the mailflow,
either its interrupted or is experiencing delays.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>Do
anybody have a better idea or know of something that can do this already?<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>My
root file system ran full last week, and it caused mails to still be accepted
(incoming is on /var on another disk) but MS was frozen because it couldn’t
extract attachments to /tmp which was full because it was on the same disk as
the root fs.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'>I
hope I have made the above somewhat clear, if not please ask me to clarify.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><b><font size=2 face=Verdana><span lang=EN-GB
style='font-size:10.0pt;font-family:Verdana;font-weight:bold'>Med venlig hilsen
/ Best regards</span></font></b><font size=3 face="Times New Roman"><span
style='font-size:12.0pt;font-family:"Times New Roman"'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt;font-family:"Times New Roman"'> <o:p></o:p></span></font></p>
<p class=MsoNormal><b><font size=2 face=Verdana><span lang=EN-GB
style='font-size:10.0pt;font-family:Verdana;font-weight:bold'>Jonas Akrouh
Larsen<o:p></o:p></span></font></b></p>
<p class=MsoNormal><b><font size=3 face="Times New Roman"><span lang=EN-GB
style='font-size:12.0pt;font-family:"Times New Roman";font-weight:bold'><o:p> </o:p></span></font></b></p>
<p class=MsoNormal><font size=2 face=Verdana><span lang=EN-GB style='font-size:
10.0pt;font-family:Verdana'>TechBiz ApS<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span lang=DA style='font-size:
10.0pt;font-family:Verdana'>Laplandsgade 4, 2. sal</span></font><font size=3
face="Times New Roman"><span lang=DA style='font-size:12.0pt;font-family:"Times New Roman"'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span lang=DA style='font-size:
10.0pt;font-family:Verdana'>2300 København S</span></font><font size=3
face="Times New Roman"><span lang=DA style='font-size:12.0pt;font-family:"Times New Roman"'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span lang=DA style='font-size:
10.0pt;font-family:Verdana'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span lang=DA style='font-size:
10.0pt;font-family:Verdana'>Office: 7020 0979<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>Direct: 33369974</span></font><font size=3
face="Times New Roman"><span style='font-size:12.0pt;font-family:"Times New Roman"'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>Fax: 7020 0978<o:p></o:p></span></font></p>
<p class=MsoNormal><st1:City w:st="on"><st1:place w:st="on"><font size=2
face=Verdana><span style='font-size:10.0pt;font-family:Verdana'>Mobile</span></font></st1:place></st1:City><font
size=2 face=Verdana><span style='font-size:10.0pt;font-family:Verdana'>:
51201096</span></font><font size=3 face="Times New Roman"><span
style='font-size:12.0pt;font-family:"Times New Roman"'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Verdana><span style='font-size:10.0pt;
font-family:Verdana'>Web: </span></font><font size=2 face=Verdana><span
lang=DA style='font-size:10.0pt;font-family:Verdana'><a
href="http://www.techbiz.dk/" title="http://www.techbiz.dk/"><span lang=EN-US>www.techbiz.dk</span></a></span></font><font
size=2 face=Verdana><span style='font-size:10.0pt;font-family:Verdana'><o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span lang=DA
style='font-size:12.0pt;font-family:"Times New Roman"'><br>
This email and any files transmitted with it are confidential and intended
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<br>This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. This message contains confidential information and is intended only for the individual named. If you are not the named addressee you should not disseminate, distribute or copy this e-mail.</body>
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