Web-based e-mail Rules...

Greetings, I have started receiving SPAM e-mail from the sender "Instagram". It was easy enough to set up a rule in Outlook to automatically send those e-mails to my JUNK Folder. The question I have, is there a way to set up a RULE in Xfinity's Web-based internet e-mail so that this SPAM is deleted at the source level, i.e., in web-mail? It would be great to send those to the SPAM folder at the web-based/internet level instead of them filtering down to Outlook. Thanks for any advice!!