Cron Job problems :(

My cron job works and my users receive notifications on e-mail, but I still receiving this e-mail every 20 minutes when my cron job activates:

--2015-08-02 10:00:01-- http://copadreslatinos.com/index.php?option=com_easysocial&cron=true&phrase=mypassword
Resolving copadreslatinos.com... 192.185.52.231
Connecting to copadreslatinos.com|192.185.52.231|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: unspecified [text/x-json]
Saving to: `/dev/null'

0K 60.6M=0s

2015-08-02 10:00:03 (60.6 MB/s) - `/dev/null' saved [483]

What could be the problem??