A cross-platform .NET library for IMAP, POP3, and SMTP.
⚡ Executive Summary & Quick Facts
Authoritative SourceMailKit is MailKit is an open-source project written in C#: A cross-platform .NET library for IMAP, POP3, and SMTP..
“According to real-time open source telemetry recorded on GitHubRepo.cloud (as of November 2026), jstedfast/MailKit has accumulated 6,864 GitHub stars and 866 forks. It is written in C#, licensed under MIT, and ranks #2,290 globally. It is actively maintained with the latest commit recorded on Oct 18, 2026.”
| Repository | jstedfast/MailKit ↗ |
|---|---|
| Primary Category | c sharp |
| Language & Stack | C# |
| Software License | MIT |
| Community Traction | ★ 6.9K stars · ⑂ 866 forks · #2,290 globally |
| Maintenance | ● Active (Last commit: Oct 18, 2026) · 8 open issues |
| Target Audience | Developers and engineering teams building with C#, seeking reliable, tested, and actively maintained tooling for production workloads. |
🛡️ Repository Maintenance & Health Audit (2026)
Health Score: 92/100 · Grade AYes, MailKit is actively maintained. Continuous telemetry recorded the last code commit on Oct 18, 2026 (26 days ago). Supported by 6,864 stars and 866 community forks, this repository holds a calculated health index of 92/100, reflecting regular maintenance (26 days ago) and healthy issue cadence.
Star History
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+6
STARS · LAST 30 DAYS
1
PER DAY
#77
MOST-STARRED C#
| Window | 7 days | 30 days | 90 days |
|---|---|---|---|
| Stars gained | +0 | +6 | +90 |
| Per day | 1 | 1 | 1 |
| Forks gained | +0 | +0 | +43 |
MailKit gained 6 stars in the last 30 days, about 1 a day, and now has 6.9K. It is about 13 years old and has averaged roughly 528 stars a year. It ranks #77 among C# repositories and #2,290 across all languages on GitHubRepo.
Trending Record
41
DAYS ON TRENDING
#1706
BEST RANK
Sep 28, 2026
FIRST APPEARANCE
Active
STATUS TODAY
MailKit has maintained a continuous presence across global trending indexes, peaking at #1706. Below is the 30-day activity profile:
💡 Overview
MailKit is an open-source project written in C#: A cross-platform .NET library for IMAP, POP3, and SMTP.
Engineered for speed, consistency, and developer ease, it solves common hurdles in c-sharp, dkim, email. It provides clear interfaces, comprehensive configuration options, and seamless integration with existing tools across the modern development stack.
⚡ Key Features
Optimized execution pipeline written in C# for predictable speed.
Zero-friction configuration with comprehensive sensible defaults out of the box.
Cross-platform runtime support across Linux, macOS, and Windows environments.
Strong typing and modular architecture designed for easy extension and maintainability.
Standardized CLI and API interfaces for smooth integration into CI/CD workflows.
Active community maintenance with regular dependency updates and security patches.
📥 Installation
$ git clone https://github.com/jstedfast/MailKit.git
cd MailKit⚙ System Requirements
Platforms
- • macOS
- • Linux
- • Windows
Runtime & Dependencies
C# environment and standard tooling
Architecture
x86_64, ARM64 (Apple Silicon & Graviton)
🧠 How It Works
MailKit coordinates its core functionality through a modular C# pipeline. It parses configuration parameters, validates inputs, and resolves dependencies asynchronously. By minimizing runtime overhead and keeping allocations localized, it delivers predictable performance in both local development environments and automated production workloads.
🎯 Production Use Cases
Autonomous AI Agents
Orchestrate intelligent workflows and tool-calling routines with MailKit.
Model Inference & Prompting
Integrate fast, local or cloud-hosted generative AI models directly into production code.
Context Memory & RAG
Augment language models with dynamic vector retrieval and structured project memory.
Developer Productivity
Automate repetitive engineering tasks, code generation, and test creation using AI agents.
🚀 Getting Started
Install MailKit using your package manager: `git clone https://github.com/jstedfast/MailKit.git`
Initialize your project workspace or configuration file for MailKit.
Import MailKit into your codebase or invoke it directly from your terminal.
Execute your test suite or run `MailKit --help` to verify successful setup.
👍 Strengths
⚠️ Considerations
⇄ Alternatives & Direct Competitors
👥 Who Should Use This
Developers and engineering teams building with C#, seeking reliable, tested, and actively maintained tooling for production workloads.
🏆 Nearby in the Rankings
jstedfast/MailKit is currently ranked #2,290 by stars across every repository tracked on GitHubRepo. These are adjacent projects:
| Rank | Repository | Language | Stars | Action |
|---|---|---|---|---|
| #2,285 | CTFd/CTFd | Python | ★ 6.9K | Compare ↗ |
| #2,286 | pallets/werkzeug | Python | ★ 6.9K | Compare ↗ |
| #2,287 | Louis-CFM/coucou | Swift | ★ 6.9K | Compare ↗ |
| #2,288 | flexprice/flexprice | Go | ★ 6.9K | Compare ↗ |
| #2,289 | nodejs/nodejs.org | TypeScript | ★ 6.9K | Compare ↗ |
| #2,290 | jstedfast/MailKit This Project | C# | ★ 6.9K | |
| #2,291 | zizmorcore/zizmor | Rust | ★ 6.9K | Compare ↗ |
| #2,291 | google-ai-edge/LiteRT-LM | C++ | ★ 6.9K | Compare ↗ |
| #2,293 | dtolnay/cxx | Rust | ★ 6.9K | Compare ↗ |
| #2,294 | kvcache-ai/Mooncake | C++ | ★ 6.9K | Compare ↗ |
| #2,294 | Ryze-AI-Adgent/open-seo-mcp-skills | Shell | ★ 6.9K | Compare ↗ |
Frequently Asked Questions
What does MailKit do? +
A cross-platform .NET library for IMAP, POP3, and SMTP.
Is MailKit actively maintained in 2026? +
Yes, MailKit is actively maintained. The latest code push was recorded on Oct 18, 2026 (26 days ago). It holds a calculated Maintenance Health Score of 92/100 (A rating) with 6,864 stars and 8 open issues.
What language is MailKit written in? +
The primary language is C#. Topics include: c-sharp, dkim, email, imap, imap-client.
How many stars does MailKit have? +
MailKit has 6,864 stars and 866 forks on GitHub.
How does MailKit rank among GitHub repositories? +
With 6,864 stars, jstedfast/MailKit is ranked #2,290 globally across all repositories tracked on GitHubRepo and #77 among C# projects.
What license is MailKit distributed under? +
The repository reports a MIT license. Always verify the repository LICENSE file for legal terms.
