jstedfast/MimeKit
A .NET MIME creation and parser library with support for S/MIME, PGP, DKIM, TNEF and Unix mbox spools. observed · 2026-08-28
Health v2 · maintenance only
76/100
- Activity 97
- Release rhythm 35
- Longevity 100
Flags: no_releases
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-03. Adoption (stars, forks) is never an input.
- gap_med: n/a
- age_days: 5057
- days_rel: n/a
- days_push: 18
- n_releases_24m: 0
Adoption not part of the score
2000 stars · 388 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded
MimeKit is a C#/.NET library for creating and parsing MIME email messages, with support for S/MIME, OpenPGP, DKIM, ARC, TNEF, and Unix mbox spools. It is designed for high performance, capable of parsing gigabytes of mail in seconds, and runs across Windows, Linux, macOS, iOS, and Android.
Use cases
- parse email messages from streams or files in .NET
- parse a Unix mbox spool file
- create MIME-compliant email messages programmatically
- encrypt, decrypt, sign, and verify S/MIME messages
- sign and verify OpenPGP email messages
- verify DKIM and ARC signatures on incoming mail
- build cross-platform mobile mail apps with Xamarin
When to choose
- you need a fast, robust MIME parser for .NET that handles arbitrary character encodings
- you need S/MIME, OpenPGP, DKIM, or ARC support in email processing
- you need to parse mbox spools or large volumes of mail quickly
- you want a free, MIT-licensed library usable commercially across desktop and mobile platforms
When to avoid
- you need SMTP/IMAP/POP3 client functionality - use its companion library MailKit instead
- you are not on a .NET platform
- you need a lightweight non-.NET MIME parser in C, Python, or another language
Facets
library · maturity stable
parser serialization cryptography email email security developer-tools parsers dotnet cross-platform windows mime smime openpgp dkim arc mbox tnef mail-processing nuget linux macos android ios
5 sources
- readme: https://github.com/jstedfast/MimeKit · fetched 2026-08-28 · 59d558658b43
- homepage: http://www.mimekit.net · fetched 2026-08-29 · d0244e6a4814
- site_page: https://mimekit.net/docs · fetched 2026-08-29 · a1b0716a5a55
- site_page: https://mimekit.net/docs/html/Parsing-Messages.htm · fetched 2026-08-29 · e0ca0691ddc3
- site_page: https://mimekit.net/docs/html/Working-With-SMime.htm · fetched 2026-08-29 · 403299079b12
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| jstedfast/MimeKit | main | 76 |
For agents
markdown · JSON · MCP: product_card(name="jstedfast/MimeKit")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem