Xfinity Forum Archive...
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Content in this area has been identified as outdated or irrelevant.
This change was done in an effort to make the forum easier to use and to keep only the most helpful and recent content active.
Post your questions in the Xfinity Community
Assuming you are still on the old email format-------------
From your Inbox page, go to Preferences>>>>>>Email>>>>>>>>Email Filters. Click on that, and then follow the prompts to set up a filter for that sender. One of the options is "Discard", which dumps any emails from that sender and you just never see them.
If you are on the new format, click on the gear icon in the upper right corner of the screen, then on Settings. There you will see Filter Rules. Click on that and follow the prompts.