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Sender Icons for Outlook: Spot important emails faster, click fewer ads

Chrome extension by Tooltester · Productivity · Communication

A Chrome extension in Productivity · Communication with 9 users, barely installed.

No site access is declared in the manifest, so it cannot read the pages you open on its own.

What the developer says, and 3 screenshots

Loading from the Chrome Web Store. Open the listing if it does not appear.

Users
9
Rating
not rated yet
Users, last 14 days
+2
Version
1.0.6
Updated in the store
2026-09-01
Published
2026-07-15
Manifest
V3
Browser access
2 permissions

How it has moved

Users
+2 since 01.09
7-9 · 9 readings
  1. 2026-09-017
  2. 2026-09-038
  3. 2026-09-047
  4. 2026-09-069
  5. 2026-09-077
  6. 2026-09-098
  7. 2026-09-107
  8. 2026-09-139
  9. 2026-09-149
Users
+2 since 01.09
7-9 · 9 readings
  1. 2026-09-017
  2. 2026-09-038
  3. 2026-09-047
  4. 2026-09-069
  5. 2026-09-077
  6. 2026-09-098
  7. 2026-09-107
  8. 2026-09-139
  9. 2026-09-149

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing more than once a day and record a point only when something moves. History beyond ninety days is in the app.

What it can reach

No site access is declared in the manifest, so it cannot read the pages you open on its own.

  • Run its own code on the pages it can access scripting
  • Store data in your browser storage

The full permission history for this extension

What changed recently

Nothing has moved on this listing since we started watching it.

The publisher

Tooltester publishes 3 listings we track, 1k users between them. Listed website: emailtooltester.com.

  1. Email Detective for Gmail: Identify ESPs & Check Authentication Tooltester · Productivity · Tools · published 2026-03-23 1k users ★ 4.9
  2. Email Detective for Outlook: Identify ESPs & Check Authentication Tooltester · Productivity · Tools · published 2026-05-29 112 users ★ 5.0

Like this one

Listings the catalog judges closest in what they say they do.

  1. Outlook Ad Blocker Describes nearly the same job, smaller audience 4k users ★ 4.6
  2. Enhanced Outlook Web App Describes nearly the same job, smaller audience 7k users ★ 3.0
  3. Email Sender Icons by cloudHQ Describes nearly the same job, smaller audience 1k users ★ 4.6
  4. Dark Mode for Outlook Describes nearly the same job, smaller audience 325 users ★ 4.1
  5. Add Sender Email Address to Outlook Describes nearly the same job, smaller audience 23 users ★ 1.0

The top 5 only. The full comparison, with why each one is close, is on the alternatives page; ranking a whole neighbourhood by your own criteria is in the app.

Is this your extension?

Connect it to Ext Ops Panel and see installs, uninstalls and uninstall reasons as events arrive, not as a weekly summary.

See what the panel does

Figures come from our own daily pass over the public Chrome Web Store listing, last read on . We publish no contact details for extension developers.