Decision Workspace
smtp-message vs mailrs-smtp-proto vs mailrs-rfc5322
Side-by-side comparison of Rust crates
36
smtp-message
growingv0.1.0
Line-oriented parser and builder for SMTP protocol messages
56
mailrs-smtp-proto
experimentalv1.0.4
SMTP protocol parser, formatter, and session state machine (RFC 5321) — zero I/O, async-runtime-agnostic.
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.
Core Metrics
| smtp-message | mailrs-smtp-proto | mailrs-rfc5322 | |
|---|---|---|---|
| Health Score | 36 | 56 | 53 |
| Total Downloads | 4.0K | 80 | 49 |
| 30d Downloads | 0 | 0 | 0 |
| Dependents | 4 | 0 | 4 |
| Releases | 1 | 5 | 2 |
| Last Updated | 1324d ago | 4d ago | 3d ago |
| Age | 3y 7m | 6d | 4d |
Health Breakdown
smtp-message
Maintenance
1
Quality
14
Community
8
Popularity
4
Documentation
9
mailrs-smtp-proto
Maintenance
19
Quality
16
Community
6
Popularity
2
Documentation
13
mailrs-rfc5322
Maintenance
14
Quality
16
Community
8
Popularity
2
Documentation
13
Technical Details
| smtp-message | mailrs-smtp-proto | mailrs-rfc5322 | |
|---|---|---|---|
| Version | 0.1.0 | 1.0.4 | 1.0.1 |
| Stable (≥1.0) | ✗ No | ✓ Yes | ✓ Yes |
| License | MIT OR Apache-2.0 | Apache-2.0 OR MIT | Apache-2.0 OR MIT |
| Dependencies | 12 | 2 | 2 |
| Crate Size | 25KB | 39KB | 24KB |
| Features | 1 | 0 | 0 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2018 | 2024 | 2024 |
| 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.
- •smtp-message has the most downloads (4.0K), suggesting wider adoption.
- •⚠ smtp-message has not been updated in over a year.
- •smtp-message is pre-1.0 — API may change.