WordPress plugin comparison
Dead-Letter vs Solid Mail
At a glance
- Solid Mail has more active installs: 60K+, against fewer than 10 for Dead-Letter.
- On a typical day, Solid Mail is downloaded about 189 times, Dead-Letter about 1.
- Dead-Letter has no reviews yet.
- Solid Mail was updated more recently: May 12, 2026, against Mar 11, 2020 for Dead-Letter.
- Solid Mail is tested with a newer WordPress: 6.9.11, against 5.3.27 for Dead-Letter.
- Solid Mail has been around longer: since 2012, against 2019 for Dead-Letter.
Line by line
Solid Mail leads on 6 of 6 comparable lines.
| Metric |  Dead-Letter |  Solid Mail |
|---|---|---|
| Popular rank | #71,795 | #671 |
| Active installs | Fewer than 10 | 60K+ |
| Downloads, last 30 days | 20 | 5.4K |
| Rating | No ratings | 4.2(52) |
| Support threads resolved | – | 0% |
| Tested up to | 5.3.27 | 6.9.11 |
| Search multiplier | ×0.00 | ×0.87 |
| Last release | 6 years ago | 6 months ago |
| Requires PHP | 5.4 | 7.4 |
From WordPress.org's public data, refreshed every night. Downloads are WordPress.org's official daily figures for the last 30 days.
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