Auto-subscribe configured emails to curated newsletters so inboxes stay active.
Users
40
+19 in 30 days
Rating
0.0 / 5
unchanged in 30 days
Ratings
0
0 in 30 days
Store rank
#119K
#99K among extensions
Version
0.6.0 β Toolbar badges & status fix
updated 5 Jun 2026
Users
monthly, 5 months
Latest, 20 Oct 2026:40 usersMove the mouse over the chart for any month
Ratings count
monthly, 5 months
Latest, 20 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 Mail Warmer
Mail Warmer - Keep Every Inbox Warm & Active
Mail Warmer is a free Chrome extension that keeps your email accounts alive
and valid. It signs your addresses up to a curated list of real newsletters,
so fresh or quiet inboxes keep receiving real mail and read as active,
trusted accounts.
Why it matters: a brand-new inbox that never gets any mail looks dormant.
Providers flag, limit, or even suspend dormant accounts β and they're far
more likely to block them when you sign up for social media, affiliate
networks, or new services. Steady incoming mail keeps the account looking
real and used, so it stays usable whenever you need it.
Perfect for anyone juggling new email accounts, social and affiliate
signups, side projects, or backup inboxes that go cold.
π― WHAT IT DOES:
π¨ Keeps Accounts Alive & Valid
Subscribes your email addresses to popular newsletters so they keep
getting real messages β so providers see a used account and don't
flag, limit, or block it.
π Curated Newsletter List
Comes with a hand-picked list of quality newsletters, ready to go.
The list updates on its own in the background β nothing to maintain.
π Fills Forms For You
Opens each newsletter's signup page and fills it in automatically,
using the email and optional profile details you choose.
πͺ Cookie Warm-Up (Optional)
Visits a few normal websites and accepts their cookie banners first,
so your browser profile looks natural before any signups happen.
π See Exactly What Happened
Every signup is tracked per email, so you always know which
newsletters worked and which didn't.
π Private By Design
It never reads or sends from your inbox. Your emails and profile
details never leave your browser. Free and open source.
β SIMPLE TO USE:
1. Add your email addresses.
2. Pick the newsletters you want (or use the full curated list).
3. Hit Run β Mail Warmer does the rest.
No account. No setup. No cost.
---
π 06/01/2026 - v0.6.0:
NEW:
- Toolbar icon now shows live progress β an orange running count while
signups happen, then a green success count (or red if something failed).
- Cookie warm-up finishes with a green badge showing how many sites accepted.
- Newsletter and cookie rows now show the full name on hover.
IMPROVED:
- Cleaner single logo across the side panel and toolbar.
FIXED:
- Status labels no longer get cut off in a narrow side panel.
---
π 05/16/2026 - v0.5.0:
NEW:
- Cookie warm-up now captures and shows the cookies each visit leaves behind,
with a per-site count you can expand.
- Run ends with a total-cookies summary.
IMPROVED:
- Recognizes more cookie banners, waits a little longer on slow sites, and
uses a fresh set of well-known brand websites for the warm-up.
---
π 05/16/2026 - v0.4.0:
NEW:
- Added the Cookies tab β a one-click warm-up that builds a natural-looking
browser profile before newsletter signups run.
- Live progress, a step-by-step guide, and a summary of the last warm-up.
---
π 05/15/2026 - v0.3.0:
NEW:
- Brand-new side panel with five tabs: Run, Emails, Profile, Lists, and Log.
- Clean Gmail-style design.
- Optional profile (name, location, and more) used to fill the extra fields
some newsletters ask for.
- Smarter form detection that skips spam-trap fields and handles embedded
signup forms.
- Support for newsletters on their own custom web addresses.
---
π 05/14/2026 - v0.1.0 β v0.2.0:
NEW:
- First release: side panel, email setup, and a curated newsletter list.
- Automatic signup with an activity log and per-newsletter history.
Growth
Window
Users
Change
Ratings
Rating
7 days
+1
+2.6%
0
0.00
30 days
+19
+90.5%
0
0.00
Chrome Web Store search rankings
Where Mail Warmer appears when people search the store, with the 30 day change