Decision Workspace
mailrs-mta-sts vs wasm-smtp-tokio vs smtp_recv
Side-by-side comparison of Rust crates
50
mailrs-mta-sts
experimentalv2.0.1
RFC 8461 MTA Strict Transport Security (MTA-STS) — policy + STS record parsers, MX pattern matching, enforce(policy, mx) decision, plus a Cache trait + in-memory reference impl. Pure: no HTTP / DNS — bring your own resolver and HTTPS client and feed the parsed bytes in.
52
wasm-smtp-tokio
experimentalv0.15.1
Tokio + rustls socket adapter for wasm-smtp.
51
smtp_recv
experimentalv0.1.69
Dual-port SMTP server: Secure submission (465) & Inbound forwarding (25) / 双端口 SMTP 服务：安全提交 (465) 与入站转发 (25)
Core Metrics
| mailrs-mta-sts | wasm-smtp-tokio | smtp_recv | |
|---|---|---|---|
| Health Score | 50 | 52 | 51 |
| Total Downloads | 159 | 932 | 2.0K |
| 30d Downloads | 0 | 0 | 0 |
| Dependents | 0 | 100 | 29 |
| Releases | 3 | 15 | 54 |
| Last Updated | 40d ago | 64d ago | 26d ago |
| Age | 1m | 2m | 7m |
Health Breakdown
mailrs-mta-sts
Maintenance
12
Quality
16
Community
6
Popularity
3
Documentation
13
wasm-smtp-tokio
Maintenance
9
Quality
16
Community
11
Popularity
4
Documentation
12
smtp_recv
Maintenance
17
Quality
12
Community
10
Popularity
4
Documentation
8
Technical Details
| mailrs-mta-sts | wasm-smtp-tokio | smtp_recv | |
|---|---|---|---|
| Version | 2.0.1 | 0.15.1 | 0.1.69 |
| Stable (≥1.0) | ✓ Yes | ✗ No | ✗ No |
| License | Apache-2.0 OR MIT | Apache-2.0 | MulanPSL-2.0 |
| Dependencies | 5 | 8 | 33 |
| Crate Size | 24KB | 20KB | 57KB |
| Features | 0 | 10 | 4 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2024 | 2024 | 2024 |
| MSRV | — | 1.85 | — |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •wasm-smtp-tokio leads with a health score of 52/100, but none of the options score above 80.
- •smtp_recv has the most downloads (2.0K), suggesting wider adoption.
- •wasm-smtp-tokio, smtp_recv are pre-1.0 — API may change.