When a new event is entered why does the program send an email to an account that I did not authorize?

When I enter a new event an unauthorized email generated. Here is one of them:

(Start email)
Date: xxx, xx Jul 2016 xx:xx:xx +0000
To: dosbecadist1980 @ download - dvd . pl
From: Board Admin
Subject: New event 1/16: Help Desk

Dear Jon Cantara,
A new event has been created!
Event details: Help Desk
Begin: 10-03-2017, 09:00
End: 10-03-2017, 12:00
Closing date: 08-03-2017, 07:00
Location:
Please do not answer this E-Mail.
(End email)