Decision Workspace
smtp_send vs direct_to_mx vs lettre
Side-by-side comparison of Rust crates
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。
53
direct_to_mx
experimentalv0.3.0
Direct-to-MX email delivery with DKIM signing, IPv4 forcing, MX fallback, bulk sending, attachments, DKIM key generation, and DNS verification
65
lettre
growingv0.11.19
Email client
Core Metrics
| smtp_send | direct_to_mx | lettre | |
|---|---|---|---|
| Health Score | 47 | 53 | 65 |
| Total Downloads | 741 | 236 | 8.0M |
| 30d Downloads | 82 | 236 | 906.3K |
| Dependents | 24 | 0 | 3.5K |
| Releases | 26 | 12 | 61 |
| Last Updated | 70d ago | 24d ago | 170d ago |
| Age | 3m | 25d | 10y 5m |
Health Breakdown
smtp_send
Maintenance
15
Quality
11
Community
10
Popularity
3
Documentation
8
direct_to_mx
Maintenance
17
Quality
12
Community
6
Popularity
3
Documentation
15
lettre
Maintenance
11
Quality
14
Community
20
Popularity
8
Documentation
12
Technical Details
| smtp_send | direct_to_mx | lettre | |
|---|---|---|---|
| Version | 0.1.29 | 0.3.0 | 0.11.19 |
| Stable (≥1.0) | ✗ No | ✗ No | ✗ No |
| License | MulanPSL-2.0 | MIT | MIT |
| Dependencies | 31 | 12 | 47 |
| Crate Size | 36KB | 38KB | 159KB |
| Features | 1 | 0 | 25 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2024 | 2024 | 2021 |
| MSRV | — | 1.85 | 1.74 |
| Owners | 1 | 1 | 2 (team) |
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.