Posteo SMIME icon

Posteo SMIME

by Posteo e.K. · Privacy & Security
Manifest V3 Free
View in Chrome Web Store Data as of 15 Oct 2026

Encrypt, decrypt, sign, and verify with S/MIME in the Posteo webmailer. Your certificates (including private keys) remain on your…

Users
305
+41 in 30 days
Rating
0.0 / 5
unchanged in 30 days
Ratings
0
0 in 30 days
Store rank
#53K
#45K among extensions
Version
0.4.8
updated 7 Aug 2026

Users

monthly, 7 months
0274549Mar 2026Jul 2026Oct 2026
Latest, 15 Oct 2026: 305 usersMove the mouse over the chart for any month

Ratings count

monthly, 7 months
001Mar 2026Jul 2026Oct 2026
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 Posteo SMIME

Verschlüsseln, Entschlüsseln, Signieren und Verifizieren mit S/MIME im Posteo-Webmailer. Ihre Zertifikate bleiben auf Ihrem Gerät.

Growth

WindowUsersChangeRatingsRating
7 days+11+3.7%00.00
30 days+41+15.5%00.00
6 months+249+444.6%00.00

Version history

8 versions recorded
0.4.87 Aug 2026
0.4.711 May 2026
0.4.628 Apr 2026
0.4.523 Apr 2026
0.4.420 Apr 2026
0.4.31 Apr 2026
0.4.224 Mar 2026
0.4.014 Mar 2026

Details

Category
Privacy & Security
First seen
14 Mar 2026
Size
11.2 MB
Languages
de, en, es, fr
Pricing
Free
Extension ID
nbmeankcjkpobhgipeleejlbbmgoodnl

Permissions and risk

Moderate riskimpact 1, likelihood 3
Permissions
declarativeNetRequeststorage
Site access
https://posteo.de/*

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