Decision Workspace
mailrs-rfc5322 vs mailrs-smtp-proto vs addr-spec
Side-by-side comparison of Rust crates
53
mailrs-rfc5322
experimentalv1.0.1
Pull-based RFC 5322 message parser — lazy header lookup, byte-level scan, zero-alloc borrowed slices. Skip-ahead to the header you want without building a full Message tree.
56
mailrs-smtp-proto
experimentalv1.0.4
SMTP protocol parser, formatter, and session state machine (RFC 5321) — zero I/O, async-runtime-agnostic.
54
addr-spec
growingv0.9.1
A wicked fast UTF-8 email address parser and serializer.
Core Metrics
| mailrs-rfc5322 | mailrs-smtp-proto | addr-spec | |
|---|---|---|---|
| Health Score | 53 | 56 | 54 |
| Total Downloads | 49 | 80 | 47.3K |
| 30d Downloads | 0 | 0 | 2.9K |
| Dependents | 4 | 0 | 11 |
| Releases | 2 | 5 | 33 |
| Last Updated | 3d ago | 4d ago | 76d ago |
| Age | 4d | 6d | 3y 4m |
Health Breakdown
mailrs-rfc5322
Maintenance
14
Quality
16
Community
8
Popularity
2
Documentation
13
mailrs-smtp-proto
Maintenance
19
Quality
16
Community
6
Popularity
2
Documentation
13
addr-spec
Maintenance
15
Quality
11
Community
9
Popularity
6
Documentation
13
Technical Details
| mailrs-rfc5322 | mailrs-smtp-proto | addr-spec | |
|---|---|---|---|
| Version | 1.0.1 | 1.0.4 | 0.9.1 |
| Stable (≥1.0) | ✓ Yes | ✓ Yes | ✗ No |
| License | Apache-2.0 OR MIT | Apache-2.0 OR MIT | Apache-2.0 |
| Dependencies | 2 | 2 | 5 |
| Crate Size | 24KB | 39KB | 22KB |
| Features | 0 | 0 | 6 |
| Yanked % | 0.0% | 0.0% | 51.5% |
| Edition | 2024 | 2024 | 2021 |
| MSRV | — | — | — |
| Owners | 1 | 1 | 1 |
Links
Quick Verdict
- •mailrs-smtp-proto leads with a health score of 56/100, but none of the options score above 80.
- •addr-spec has the most downloads (47.3K), suggesting wider adoption.
- •addr-spec is pre-1.0 — API may change.