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Do you know a simple script that can do email round trip monitoring ? Here a formal example :

  • I want to monitor email service on A.
  • I install the script on B.
  • B sends an email to A
  • A sends an auto-reply to B
  • B knows that email service is working well.
  • B restarts this test every 30min.
  • If B didn't received replies, it sends an alert message.
  • B could also monitor round-trip delay of emails.

The goal is to do a simple monitoring of "end to end service" (closest to the user behavior) compared to monitoring many small pieces (ping/smtp/pop3/load/...).

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closed as too localized by SvW, Ward, EightBitTony, Khaled, John Gardeniers Jun 6 '12 at 7:59

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2 Answers 2

A perl, php, or powershell script is all I can think of, on a scheduler.

  • Send email
  • Check email
  • If email not received in N minutes, sound alarm

Would be neat if wormly and other services did this, but I do not think they do...

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***I'm assuming the user on B can send and receive emails

On B, you need to do the following:

1) Create the file /home/user/.forward with the following:


This script will forward emails received by B to mail-handler.sh

2) Create the file /home/user/mail-handler.sh

This will read the auto-reply email and decide whether the server is ok or not (I'm not going to write the script for this)

But an example of handling data in mail-handler.sh:


echo  > /home/user/test.txt

while read mail_data
        echo $mail_data >> /home/user/test.txt

3) create the file mail-sender.sh, with:

echo hello |  mail -s "test" user@domain.A.com

this will send the email out to A to test if it's alive

4) Add mail-sender.sh to cron to send this every 30mins

*/30 * * * * /home/user/mail-sender.sh
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I appreciate your answer full of details; I can easily do the rest. For my case, emails will be forwarded by A, so the main part of the test and alert would be done by B (if A crashs). –  crazyfr Jun 11 '12 at 14:36
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