Decision Workspace
smtp vs lettre vs async-smtp
Side-by-side comparison of Rust crates
38
smtp
growingv0.3.2
UNMAINTAINED - Replaced by the 'lettre' crate
65
lettre
growingv0.11.19
Email client
52
async-smtp
growingv0.10.2
SMTP client
Core Metrics
| smtp | lettre | async-smtp | |
|---|---|---|---|
| Health Score | 38 | 65 | 52 |
| Total Downloads | 58.6K | 8.0M | 427.9K |
| 30d Downloads | 29 | 906.3K | 31.5K |
| Dependents | 0 | 3.5K | 104 |
| Releases | 20 | 61 | 17 |
| Last Updated | 1674d ago | 170d ago | 318d ago |
| Age | 11y 4m | 10y 5m | 6y 4m |
Health Breakdown
smtp
Maintenance
4
Quality
14
Community
3
Popularity
6
Documentation
11
lettre
Maintenance
11
Quality
14
Community
20
Popularity
8
Documentation
12
async-smtp
Maintenance
7
Quality
15
Community
13
Popularity
7
Documentation
10
Technical Details
| smtp | lettre | async-smtp | |
|---|---|---|---|
| Version | 0.3.2 | 0.11.19 | 0.10.2 |
| Stable (≥1.0) | ✗ No | ✗ No | ✗ No |
| License | MIT | MIT | MIT OR Apache-2.0 |
| Dependencies | 9 | 47 | 14 |
| Crate Size | 21KB | 159KB | 31KB |
| Features | 1 | 25 | 3 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | — | 2021 | 2021 |
| MSRV | — | 1.74 | — |
| Owners | 1 | 2 (team) | 2 |
Links
Quick Verdict
- •lettre leads with a health score of 65/100, but none of the options score above 80.
- •lettre is depended on by 3.5K crates — strongest ecosystem trust.
- •⚠ smtp has not been updated in over a year.