Get a warning for any email addresses you aren't familiar with
Users
9
−1 in 30 days
Rating
0.0 / 5
unchanged in 30 days
Ratings
0
0 in 30 days
Store rank
#203K
#169K among extensions
Version
4.1
updated 8 Jul 2026
Users
monthly, 3 years
Latest, 15 Oct 2026:9 usersMove the mouse over the chart for any month
Ratings count
monthly, 3 years
Latest, 15 Oct 2026:0 ratingsMove the mouse over the chart for any month
The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.
About Familiar Emails
Familiar Emails
Introduction
In your inbox, see an icon by email addresses to indicate whether they are familiar or not. This can help reduce security problems like phishing by reminding you to reconsider unfamiliar emails from email addresses. You can mark individual emails as familiar, or many with the * wildcard. Thus, you can use patterns like \*@example.com or \*@\*.example.com to mark many email addresses as familiar.
Features
Supported Websites
• Gmail
Edit Familiar Email Addresses
• An interface to edit the email addresses which you consider to be familiar
Familiar/Unfamiliar Email Address Indicator
• An icon appears next to each email address
Storage Sync
• Options saved for use on any computer
Instructions
Configure Keyboard Shortcut
1. Click the icon for this extension
2. Click "Keyboard shortcuts"
3. Make a keyboard shortcut for "Big options page" or "Activate the extension"
Add Email Address
1. Open the big options page or the popup
2. Go to the field "Add email address"
3. Type in a URL like the following
• Normal: `coworker@marketing.example.com`
• Wildcard: `*@marketing.example.com` or `*@*.example.com`
4. Hit enter or click the plus button
Growth
Window
Users
Change
Ratings
Rating
7 days
−1
−10.0%
0
0.00
30 days
−1
−10.0%
0
0.00
6 months
−2
−18.2%
0
0.00
1 year
−7
−43.8%
0
0.00
Chrome Web Store search rankings
Where Familiar Emails appears when people search the store, with the 30 day change