Decision Workspace
mailrs-srs vs mailrs-spf vs viaspf
Side-by-side comparison of Rust crates
50
mailrs-srs
experimentalv1.0.1
Sender Rewriting Scheme (SRS, RFC-style) — rewrite envelope From for SPF-aware mail forwarding, with HMAC-keyed signature and timestamp. Forward + reverse + verify in one focused crate.
57
mailrs-spf
experimentalv1.0.4
RFC 7208 Sender Policy Framework verifier. Pure-Rust evaluator with a pluggable DNS resolver trait; ships an optional hickory-resolver-backed implementation. Bounded DNS-lookup limits + loop detection per spec.
54
viaspf
growingv0.6.0
Implementation of the Sender Policy Framework (SPF) specification
Core Metrics
| mailrs-srs | mailrs-spf | viaspf | |
|---|---|---|---|
| Health Score | 50 | 57 | 54 |
| Total Downloads | 34 | 83 | 111.8K |
| 30d Downloads | 0 | 0 | 0 |
| Dependents | 0 | 0 | 80 |
| Releases | 2 | 5 | 27 |
| Last Updated | 3d ago | 3d ago | 750d ago |
| Age | 3d | 3d | 5y 12m |
Health Breakdown
mailrs-srs
Maintenance
14
Quality
15
Community
6
Popularity
2
Documentation
13
mailrs-spf
Maintenance
19
Quality
17
Community
6
Popularity
2
Documentation
13
viaspf
Maintenance
9
Quality
16
Community
11
Popularity
6
Documentation
12
Technical Details
| mailrs-srs | mailrs-spf | viaspf | |
|---|---|---|---|
| Version | 1.0.1 | 1.0.4 | 0.6.0 |
| Stable (≥1.0) | ✓ Yes | ✓ Yes | ✗ No |
| License | Apache-2.0 OR MIT | Apache-2.0 OR MIT | GPL-3.0-or-later |
| Dependencies | 5 | 5 | 6 |
| Crate Size | 20KB | 38KB | 57KB |
| Features | 0 | 2 | 2 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2024 | 2024 | 2021 |
| MSRV | — | — | 1.65.0 |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •mailrs-spf leads with a health score of 57/100, but none of the options score above 80.
- •viaspf has the most downloads (111.8K), suggesting wider adoption.
- •⚠ viaspf has not been updated in over a year.
- •viaspf is pre-1.0 — API may change.