Decision Workspace
check-if-email-exists vs mailrs-smtp-client vs smtp_send
Side-by-side comparison of Rust crates
51
check-if-email-exists
growingv0.11.7
Check if an email address exists without sending any email
56
mailrs-smtp-client
experimentalv1.1.0
Outbound SMTP client: MX resolution, DANE/STARTTLS, response parsing — async, transport-agnostic primitives for RFC 5321 senders.
51
smtp_send
experimentalv0.1.33
SMTP email sending library with built-in DKIM signing and MX lookup support. / 支持内置 DKIM 签名和 MX 记录查询的 SMTP 邮件发送库。
Core Metrics
| check-if-email-exists | mailrs-smtp-client | smtp_send | |
|---|---|---|---|
| Health Score | 51 | 56 | 51 |
| Total Downloads | 215.4K | 97 | 848 |
| 30d Downloads | 8.2K | 0 | 0 |
| Dependents | 53 | 6 | 25 |
| Releases | 39 | 5 | 27 |
| Last Updated | 110d ago | 2d ago | 5d ago |
| Age | 6y 7m | 6d | 5m |
Health Breakdown
check-if-email-exists
Maintenance
12
Quality
9
Community
12
Popularity
6
Documentation
12
mailrs-smtp-client
Maintenance
19
Quality
14
Community
8
Popularity
2
Documentation
13
smtp_send
Maintenance
19
Quality
11
Community
10
Popularity
3
Documentation
8
Technical Details
| check-if-email-exists | mailrs-smtp-client | smtp_send | |
|---|---|---|---|
| Version | 0.11.7 | 1.1.0 | 0.1.33 |
| Stable (≥1.0) | ✗ No | ✓ Yes | ✗ No |
| License | AGPL-3.0 | Apache-2.0 OR MIT | MulanPSL-2.0 |
| Dependencies | 26 | 8 | 32 |
| Crate Size | 610KB | 51KB | 36KB |
| Features | 0 | 0 | 1 |
| Yanked % | 0.0% | 0.0% | 0.0% |
| Edition | 2018 | 2024 | 2024 |
| MSRV | — | — | — |
| Owners | 2 | 1 | 1 |
Links
Quick Verdict
- •mailrs-smtp-client leads with a health score of 56/100, but none of the options score above 80.
- •check-if-email-exists has the most downloads (215.4K), suggesting wider adoption.
- •check-if-email-exists, smtp_send are pre-1.0 — API may change.