Invade in the main menu on Groups, we choose the option of the Exclusion. On the page we click into the button Add the new e-mail.
We will be moved to the form. In the field the Address the e-mail one ought to define the address which we think to block. Then we click on the button Add the e-mail. The address became added about what the system informed us with the communication at the head of the page. Now we can define the following unwanted address the e-mail.