No known security advisories.
The current version has no OSV.dev malware reports and no critical or high-severity vulnerabilities.
mailchecker has 577K monthly downloads and 2K GitHub stars. Version 6.0.20 supports Python 3.6+, first published in 2018.
It is actively maintained under a permissive license, last released in Mar 2026.
It is used by 2 tracked packages, including django-email-validators and daliuge-common.
GitHub topics include email-validation, email-verification and email.
Package Insights
Package Risks
- No releases in 115 days despite active commits
Score breakdown - each component scores 0-100, weighted by percentage
Maintenance
100
Popularity
70
Adoption
77
Community
70
Provenance
0
How the maintenance status was determined
Last commit
6 days ago
Monthly downloads
576,842
•
Active
Activity within 30 days
Stable
Activity within 31-180 days
Minimal
Activity within 181-365 days, or no activity data
At Risk
No activity for > 365 days, but > 10,000 monthly downloads
Archived
Repository flagged as archived on GitHub
How the popularity category was determined
Monthly downloads
576,842
Stars
1,895
Stars per 1k downloads
3.29
Industry Standard
> 10,000,000 monthly downloads
Hidden Gem
< 0.5 stars per 1k downloads and > 100,000 monthly downloads
Community Favorite
> 5 stars per 1k downloads
•
Rising Star
Balanced ratio of stars to downloads
Unknown
Fewer than 1,000 monthly downloads, or no star data
How download momentum is calculated
Week daily avg
19,989
Month daily avg
19,228
Momentum
+4.0%
((week_daily_avg - month_daily_avg) / month_daily_avg) * 100Python version support tiers
requires_python
>=3.6
Cutting Edge
Minimum supported version is 3.12 or newer
Modern
Minimum supported version is 3.9, 3.10, or 3.11
•
Legacy
Supports 3.8 or older (or Python 2)
Unknown
No requires_python specified or unparseable
License categories
License
MIT License
•
Permissive
MIT, Apache, BSD, ISC, Unlicense, CC0, etc.
Copyleft
GPL, LGPL, AGPL, MPL, EPL, etc.
Proprietary
Commercial, all rights reserved, custom EULAs
Unknown
No license specified, or none of the above match
How the release cadence was determined
Last release
122 days ago
Total releases
120
Releases/year
14.5
•
Rapid
Last release within 365 days and > 12 releases/year
Regular
Last release within 365 days
Slow
Last release 366-730 days ago
Stalled
Last release > 730 days ago, or no releases
Unknown
No usable release date available
How contributor risk was determined
Contributors
191
Monthly downloads
576,842
High Load
≤ 2 contributors and ≥ 50,000 monthly downloads
Moderate Load
< 10 contributors and ≥ 500,000 monthly downloads
Low Load
< 25 contributors and ≥ 5,000,000 monthly downloads, or sole maintainer with ≥ 10,000 monthly downloads
•
Balanced
Enough contributors for the package's popularity
Unknown
No contributor data available
Engagement
60
Issue Burden
1.6
per 1k stars
Discussions
0.0
per 1k stars
Fork Ratio
62.6%
contrib / forks
Stale Release
115d
PR Velocity
Quiet
Weekly Downloads
GitHub Stars
Not all downloads include detailed metadata. Breakdowns reflect the subset that does.
Downloads by OS
Linux
12.6K
Windows
44
macOS
42
Python Versions
3.10
71.4%
8.8K
3.11
21.9%
2.7K
3.7
3.3%
412
3.12
1.8%
221
3.13
1.6%
198
Top Countries
1.
US
12.2K
US
2.
DE
236
DE
3.
FR
84
FR
4.
RU
81
RU
5.
GB
33
GB
6.
SG
32
SG
7.
CN
28
CN
8.
BR
18
BR
9.
AU
9
AU
10.
CA
8
CA
Dependencies
0
No dependencies
Used By
2
GitHub Topics
Tags from the package's GitHub repository describing what it does.
Package Information
License
MIT License
First Release
March 23, 2018
Last Release
4 months ago
Last Commit
1 week ago
Latest Version
6.0.20
Total Releases
120
Contributors
191
Open PRs
2
Archived
No
Author
Francois-Guillaume Ribreau
Python Versions
3
Wheels
py3
Tracking Since
January 6, 2026
Data Updated
July 5, 2026
Data Freshness
Fresh