basecamp/mail_view
Visual email testing observed · 2026-08-28
Health v2 · maintenance only
10/100
- Activity 0
- Release rhythm 35
- Longevity 100
Flags: no_releases archived
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-02. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 5978
- days_rel: n/a
- days_push: 3128
- n_releases_24m: 0
Adoption not part of the score
1321 stars · 128 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
MailView is a Ruby gem that lets Rails developers preview plain text and HTML email templates in a browser without actually sending mail. It was merged into Rails 4.1+ as ActionMailer previews, so the standalone gem is largely superseded.
Use cases
- preview email templates in the browser during development
- test mailer views without sending real emails
- render emails with fixture or factory data
- visually inspect plain text and HTML email output
- set up mailer preview scenarios like unit tests
When to choose
- you maintain a legacy Rails 2.x or 3.x app that predates built-in mailer previews
- you want a lightweight standalone email preview tool for non-Rails-4.1 Ruby projects
When to avoid
- you are on Rails 4.1 or later, which includes ActionMailer previews natively
- you need actively maintained software with recent releases
- you need email testing features beyond simple visual preview, such as delivery interception
Facets
library · maturity maintenance
testing email web-framework templating web-development testing developer-tools email ruby self-hosted email-previews action-mailer rails mail-templates development-tools web-server
1 source
- readme: https://github.com/basecamp/mail_view · fetched 2026-08-28 · 8f8f5608af04
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| basecamp/mail_view | main | 10 |
For agents
markdown · JSON · MCP: product_card(name="basecamp/mail_view")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem