Decision Workspace
smtp_send vs direct_to_mx vs lettre
Side-by-side comparison of Rust crates
51
smtp_send
experimentalv0.1.33
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。
49
direct_to_mx
experimentalv0.3.2
Direct-to-MX email delivery with DKIM signing, IPv4 forcing, MX fallback, bulk sending, attachments, DKIM key generation, and DNS verification
73
lettre
growingv0.11.22
Email client
Core Metrics
| smtp_send | direct_to_mx | lettre | |
|---|---|---|---|
| Health Score | 51 | 49 | 73 |
| Total Downloads | 848 | 274 | 10.3M |
| 30d Downloads | 0 | 0 | 1.3M |
| Dependents | 25 | 0 | 4.6K |
| Releases | 27 | 14 | 64 |
| Last Updated | 5d ago | 2d ago | 11d ago |
| Age | 5m | 2m | 10y 7m |
Health Breakdown
smtp_send
Maintenance
19
Quality
11
Community
10
Popularity
3
Documentation
8
direct_to_mx
Maintenance
13
Quality
12
Community
6
Popularity
3
Documentation
15
lettre
Maintenance
19
Quality
14
Community
20
Popularity
8
Documentation
12
Technical Details
| smtp_send | direct_to_mx | lettre | |
|---|---|---|---|
| Version | 0.1.33 | 0.3.2 | 0.11.22 |
| Stable (≥1.0) | ✗ No | ✗ No | ✗ No |
| License | MulanPSL-2.0 | MIT | MIT |
| Dependencies | 32 | 11 | 46 |
| Crate Size | 36KB | 42KB | 161KB |
| Features | 1 | 0 | 26 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2024 | 2024 | 2024 |
| MSRV | — | 1.85 | 1.85 |
| Owners | 1 | 1 | 2 (team) |
Links
Quick Verdict
- •lettre leads with a health score of 73/100, but none of the options score above 80.
- •lettre is depended on by 4.6K crates — strongest ecosystem trust.