Decision Workspace
mailrs-inbound vs mail-auth vs vsmtp-auth
Side-by-side comparison of Rust crates
55
mailrs-inbound
experimentalv1.1.0
Composable SMTP receive pipeline framework — Stage trait + early-reject executor + pure decision logic + RFC 8601 Authentication-Results helpers. Framework-only; bring your own greylist / DKIM / virus-scan / scoring stages.
61
mail-auth
growingv0.9.0
DKIM, ARC, SPF and DMARC library for Rust
59
vsmtp-auth
growingv2.2.1
Next-gen MTA. Secured, Faster and Greener
Core Metrics
| mailrs-inbound | mail-auth | vsmtp-auth | |
|---|---|---|---|
| Health Score | 55 | 61 | 59 |
| Total Downloads | 108 | 371.2K | 51.2K |
| 30d Downloads | 0 | 15.3K | 0 |
| Dependents | 0 | 53 | 125 |
| Releases | 7 | 28 | 36 |
| Last Updated | 2d ago | 20d ago | 1151d ago |
| Age | 4d | 3y 5m | 3y 9m |
Health Breakdown
mailrs-inbound
Maintenance
19
Quality
15
Community
6
Popularity
2
Documentation
13
mail-auth
Maintenance
19
Quality
14
Community
11
Popularity
7
Documentation
10
vsmtp-auth
Maintenance
7
Quality
18
Community
13
Popularity
6
Documentation
15
Technical Details
| mailrs-inbound | mail-auth | vsmtp-auth | |
|---|---|---|---|
| Version | 1.1.0 | 0.9.0 | 2.2.1 |
| Stable (≥1.0) | ✓ Yes | ✗ No | ✓ Yes |
| License | Apache-2.0 OR MIT | Apache-2.0 OR MIT | GPL-3.0-only |
| Dependencies | 4 | 18 | 19 |
| Crate Size | 33KB | 176KB | 24KB |
| Features | 0 | 7 | 1 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2024 | 2024 | 2021 |
| MSRV | — | — | 1.66.1 |
| Owners | 1 | 1 | 2 |
Links
Quick Verdict
- •mail-auth leads with a health score of 61/100, but none of the options score above 80.
- •vsmtp-auth is depended on by 125 crates — strongest ecosystem trust.
- •⚠ vsmtp-auth has not been updated in over a year.
- •mail-auth is pre-1.0 — API may change.