Decision Workspace
outlook-exe vs lettre vs mml-lib
Side-by-side comparison of Rust crates
40
outlook-exe
growingv0.1.0
Convenience wrappers for command-line invocation of Outlook.
69
lettre
growingv0.11.22
Email client
57
mml-lib
stablev1.1.2
Rust implementation of the Emacs MIME message Meta Language (MML)
Core Metrics
| outlook-exe | lettre | mml-lib | |
|---|---|---|---|
| Health Score | 40 | 69 | 57 |
| Total Downloads | 3.3K | 12.9M | 75.9K |
| 30d Downloads | 0 | 845.3K | 2.0K |
| Dependents | 0 | 5.6K | 53 |
| Releases | 2 | 64 | 31 |
| Last Updated | 2142d ago | 60d ago | 144d ago |
| Age | 6y 3m | 10y 8m | 2y 10m |
Health Breakdown
outlook-exe
Maintenance
3
Quality
15
Community
6
Popularity
4
Documentation
12
lettre
Maintenance
15
Quality
14
Community
20
Popularity
8
Documentation
12
mml-lib
Maintenance
12
Quality
15
Community
11
Popularity
6
Documentation
13
Technical Details
| outlook-exe | lettre | mml-lib | |
|---|---|---|---|
| Version | 0.1.0 | 0.11.22 | 1.1.2 |
| Stable (≥1.0) | ✗ No | ✗ No | ✓ Yes |
| License | Unlicense OR MIT | MIT | MIT |
| Dependencies | 2 | 46 | 18 |
| Crate Size | 4KB | 161KB | 67KB |
| Features | 0 | 26 | 15 |
| Yanked % | 0.0% | 0.0% | 41.9% |
| Edition | 2018 | 2024 | 2021 |
| MSRV | — | 1.85 | — |
| Owners | 1 | 2 (team) | 1 |
Links
Quick Verdict
- •lettre leads with a health score of 69/100, but none of the options score above 80.
- •lettre is depended on by 5.6K crates — strongest ecosystem trust.
- •⚠ outlook-exe has not been updated in over a year.
- •outlook-exe, lettre are pre-1.0 — API may change.