---
title: "GMailSend Address Checker - 誤送信防止 - – Chrome extension stats, history and permissions"
description: "100,000 users, rated 4.40 by 20 people. Version 0.28.1, updated 2022-10-07. Requests 0 permissions."
url: "https://extensiontracker.com/extension/gdckkpniogfhndklmlgbnolnkbceeofp"
---

# GMailSend Address Checker - 誤送信防止 -

Live in the Chrome Web Store.

- Users: 100,000
- Rating: 4.40 from 20 ratings
- Last checked: 2026-09-27 01:34 UTC
- Users gained in 7 days: – (needs a week of history)
- Users gained in 30 days: – (needs a month of history)
- Rank by users: #1,082 of 264,703 live extensions
- Rank in Workflow & Planning: #384 of 44,474

## The listing

What the Chrome Web Store shows, as of the last check.

Summary from the listing:

> メール送信前に、From,To,Cc,Bcc,件名,添付ファイルをチェックして、誤送信を防止します。 (C)SEYA.WORK

- Extension ID: `gdckkpniogfhndklmlgbnolnkbceeofp`
- Developer: [SEYA.WORK](https://extensiontracker.com/developer/u775cd9c8d5d128308d79e6c4820c7771)
- Category: [Productivity › Workflow & Planning](https://extensiontracker.com/category/productivity/workflow)
- First published: 2015-05-07
- Last updated: 2022-10-07
- Version: `0.28.1`
- Size: 22.11 KiB
- Minimum Chrome: 88
- Languages (6): Deutsch, English (United States), Tiếng Việt, 中文（台灣）, 日本語, 한국어
- Website: `seya.work`
- Chrome Web Store: <https://chromewebstore.google.com/detail/gmailsend-address-checker/gdckkpniogfhndklmlgbnolnkbceeofp>
- View the code or download the CRX, in CRX Viewer: <https://robwu.nl/crxviewer/?crx=https%3A%2F%2Fchromewebstore.google.com%2Fdetail%2Fgdckkpniogfhndklmlgbnolnkbceeofp>

## Users over time

One row per check, newest first, as shown on the Chrome Web Store.

| Checked | Users | Rating | Ratings |
| --- | ---: | ---: | ---: |
| 2026-09-27 | 100,000 | 4.40 | 20 |

## What changed

Every change found on a check, newest first.

No changes found since tracking began on 2026-09-27.

## What it can access

From the extension's manifest, in plain language.

### Sites where it runs scripts

- `http://mail.google.com/*`: mail.google.com
- `https://mail.google.com/*`: mail.google.com

## About this data

Collected from the extension's public Chrome Web Store listing. It's checked every week, because it has 1,000 or more users, and again whenever a new version appears. Last checked 2026-09-27 01:34 UTC; next check around 2026-09-30.

How the data is collected: <https://extensiontracker.com/methodology>.

## Cite this page

Extension Tracker. “GMailSend Address Checker - 誤送信防止 -” (gdckkpniogfhndklmlgbnolnkbceeofp). Chrome Web Store data, last checked 2026-09-27. https://extensiontracker.com/extension/gdckkpniogfhndklmlgbnolnkbceeofp. Accessed 2026-09-28.

```bibtex
@misc{extensiontracker_gdckkpniogfhndklmlgbnolnkbceeofp,
  title   = {GMailSend Address Checker - 誤送信防止 - (gdckkpniogfhndklmlgbnolnkbceeofp)},
  author  = {{Extension Tracker}},
  year    = {2026},
  note    = {Chrome Web Store data, last checked 2026-09-27},
  url     = {https://extensiontracker.com/extension/gdckkpniogfhndklmlgbnolnkbceeofp},
  urldate = {2026-09-28}
}
```

---

From Extension Tracker, a public record of the Chrome Web Store: <https://extensiontracker.com/extension/gdckkpniogfhndklmlgbnolnkbceeofp>. It isn't affiliated with Google. The data is free to reuse under CC BY 4.0 (<https://creativecommons.org/licenses/by/4.0/>), crediting Extension Tracker. Extension, developer and list pages come as Markdown too: add `format=md` to the address, as in `https://extensiontracker.com/extension/{id}?format=md`.