There is two options in there, "Ignore, where it is supposed to block all mails from a specific person, and the report option ("..harassing or inappropriate please report it to us and keep the mail in your inbox or other folder for us to check").
By: Lark Moderator / Knowledgeable Sep 05, 2014
Post # 6
DarkAdept is correct. You can click on the "block" setting to prevent getting further e-mails from that person. Then save the e-mail in your "Default" folder and send an e-mail to Petrarca, the site administrator to take appropriate action.