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Email Privacy

How to Filter Junk Email

Gmail, Yahoo, Xfinity filters, hidden tracking pixels, and the safest way to unsubscribe.

Gmail Filters

Gmail's filter system is powerful but buried. Here's how to use it to automatically delete or archive junk before it hits your inbox.

01
Open the filter toolClick the search bar in Gmail on desktop, then click the filter icon (three sliders) on the right.
02
Set your criteriaEnter the sender email or a keyword like "unsubscribe" or "offer expires."
03
Choose the actionClick Create filter, then choose Delete it, Skip Inbox, or Apply a label.
04
Apply retroactivelyCheck "Also apply filter to matching conversations" to clean up existing emails too.
PRO TIP

Filter by domain, not just one sender. Enter @example.com in the From field to catch all emails from that domain.

Yahoo Mail

01
Open FiltersSettings gear icon, then More Settings, then Filters.
02
Add a filterClick Add new filters, name it, set conditions on From, Subject, or Body.
03
Send to TrashSelect Trash as the destination folder to auto-delete matching emails.
04
Block directlyRight-click any email and select Block Sender. Future emails go to spam automatically.

Xfinity / Comcast

01
Log inGo to connect.xfinity.com and sign in.
02
Find Spam FilterSettings, then Email Settings, then Spam Filter.
03
Enable and set sensitivityTurn on filtering and set to Medium as a starting point.
04
Block sendersAdd specific addresses under Blocked Senders.

Unsubscribe vs Delete

Legitimate senders: Use the unsubscribe link. Companies are legally required to honor it within 10 days under CAN-SPAM.

Unknown or sketchy senders: Never click unsubscribe. It confirms your email is active and leads to more spam. Just delete or block.

WARNING

If an email looks off - odd sender, poor grammar, urgent tone - do not click anything including unsubscribe. Mark as spam.

Tracking Pixels

Many marketing emails contain invisible 1x1 images. When you open the email it silently notifies the sender, sharing your approximate location and device type.

Gmail: Settings, See all settings, General, Images, select Ask before displaying external images.

Apple Mail: Settings, Mail, Privacy Protection, enable Protect Mail Activity. Apple routes images through a proxy to mask your IP.

HARBOR PRIVACY TIP

DNS-level blocking stops tracking pixel domains at the network level before they reach any email app on any device in your home.