Decision Workspace
async-smtp vs lettre vs smtp_send
Side-by-side comparison of Rust crates
52
async-smtp
growingv0.10.2
SMTP client
65
lettre
growingv0.11.19
Email client
47
smtp_send
experimentalv0.1.29
SMTP email sending library with built-in DKIM signing and MX lookup support. / 支持内置 DKIM 签名和 MX 记录查询的 SMTP 邮件发送库。
Core Metrics
| async-smtp | lettre | smtp_send | |
|---|---|---|---|
| Health Score | 52 | 65 | 47 |
| Total Downloads | 427.9K | 8.0M | 741 |
| 30d Downloads | 31.5K | 906.3K | 82 |
| Dependents | 104 | 3.5K | 24 |
| Releases | 17 | 61 | 26 |
| Last Updated | 318d ago | 170d ago | 70d ago |
| Age | 6y 4m | 10y 5m | 3m |
Health Breakdown
async-smtp
Maintenance
7
Quality
15
Community
13
Popularity
7
Documentation
10
lettre
Maintenance
11
Quality
14
Community
20
Popularity
8
Documentation
12
smtp_send
Maintenance
15
Quality
11
Community
10
Popularity
3
Documentation
8
Technical Details
| async-smtp | lettre | smtp_send | |
|---|---|---|---|
| Version | 0.10.2 | 0.11.19 | 0.1.29 |
| Stable (≥1.0) | ✗ No | ✗ No | ✗ No |
| License | MIT OR Apache-2.0 | MIT | MulanPSL-2.0 |
| Dependencies | 14 | 47 | 31 |
| Crate Size | 31KB | 159KB | 36KB |
| Features | 3 | 25 | 1 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2021 | 2021 | 2024 |
| MSRV | — | 1.74 | — |
| Owners | 2 | 2 (team) | 1 |
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.