In this article we are going to see how can we configure jmeter by changing property of JMeter. In this section we will see the different settings for Mailer Model/Load sampler in jmeter.properties.

In the jmeter installed bin directory(in my case C:\apache-jmeter-2.8\bin), we get a file named jmeter.properties. Open this with note pad.

----------------Mailer Model configuration-------
(It is kind of Listener, it will be useful if we integrate mailing system/logging )

-To set the number of successful samples before a message is sent
mailer.successlimit=2

-To set Number of failed samples before a message is sent
mailer.failurelimit=2

------------------- LDAP Sampler configuration----------------------------
-To set the Max number of search results to be sorted(0=turn off all sorting)
ldapsampler.max_sorted_results=1000

-To set the Number of characters to log for each of three sections (a value of 100 means a maximum of 300 characters of diff text will be displayed)
assertion.equals_section_diff_len=100
Note:A number of extra characters needed like "..." and "[[["/"]]]" which are used to decorate it.

-To set test written out to log to signify start/end of diff delta
assertion.equals_diff_delta_start=[[[
assertion.equals_diff_delta_end=]]]

I will try to provide example for this part.
...Thanks..:)