Okey, didn’t know that, it was the first time in ten years I copy & pasted from the manual.
What do you think about this example from the same example in wiki? system netwatch>
The manual says that it applies to RouterOS: v3, v4, v5 +
It’s in fact copy & pasted from earlier versions of RouterOS (see the links below). It goes back so far as RouterOS v2.4, but has been corrupted from version 2.7 to todays wiki.
RouterOS v2.9
http://www.mikrotik.com/testdocs/ros/2.9/tools/netwatch.php
RouterOS v2.8
http://www.mikrotik.com/testdocs/ros/2.8/system/scripting.php
RouterOS v2.7
http://www.mikrotik.com/documentation/manual_2.7/index.php
RouterOS v2.6
http://www.mikrotik.com/documentation/manual_2.6/index.php
RouterOS v2.5
http://www.mikrotik.com/documentation/manual_2.5/index.php
RouterOS v2.4
http://www.mikrotik.com/documentation/manual_2.4/index.php
Output from RouterOS v4:
add name=e-down policy=ftp,reboot,read,write,policy,test,winbox,password,sniff,sensitive source="/tool e-mail send from=\
\"rieks@mt.lv\" server=\"159.148.147.198\" body=\"Router down\" subject=\"Router at second floor is down\" to=\"rieks\
@latnet.lv\""
add name=e-up policy=ftp,reboot,read,write,policy,test,winbox,password,sniff,sensitive source="/tool e-mail send from=\"r\
ieks@mt.lv\" server=\"159.148.147.198\" body=\"Router up\" subject=\"Router at second floor is up\" to=\"rieks@latnet\
.lv\""
I’m a bit of a stickler for accuracy. 
netwatch.pdf (25.6 KB)