MimeKit 3.1.0

.NET 5.0 .NET Standard 2.0 .NET Framework 4.5.2
There is a newer version of this package available.
See the version list below for details.

Requires NuGet 2.12 or higher.

Install-Package MimeKit -Version 3.1.0
dotnet add package MimeKit --version 3.1.0
<PackageReference Include="MimeKit" Version="3.1.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add MimeKit --version 3.1.0
The NuGet Team does not provide support for this client. Please contact its maintainers for support.
#r "nuget: MimeKit, 3.1.0"
#r directive can be used in F# Interactive, C# scripting and .NET Interactive. Copy this into the interactive tool or source code of the script to reference the package.
// Install MimeKit as a Cake Addin
#addin nuget:?package=MimeKit&version=3.1.0

// Install MimeKit as a Cake Tool
#tool nuget:?package=MimeKit&version=3.1.0
The NuGet Team does not provide support for this client. Please contact its maintainers for support.

MimeKit is an Open Source library for creating and parsing MIME, S/MIME and PGP messages on desktop and mobile platforms. It also supports parsing of Unix mbox files.

     Unlike any other .NET MIME parser, MimeKit's parser does not need to parse string input nor does it use a TextReader. Instead, it parses raw byte streams, thus allowing it to better support undeclared 8bit text in headers as well as message bodies. It also means that MimeKit's parser is significantly faster than other .NET MIME parsers.

     MimeKit's parser also uses a real tokenizer when parsing the headers rather than regex or string.Split() like most other .NET MIME parsers. This means that MimeKit is much more RFC-compliant than any other .NET MIME parser out there, including the commercial implementations.

     In addition to having a far superior parser implementation, MimeKit's object tree is not a derivative of System.Net.Mail objects and thus does not suffer from System.Net.Mail's limitations.

     API documentation can be found on the web at http://www.mimekit.net/docs

     For those that need SMTP, POP3 or IMAP support, check out https://github.com/jstedfast/MailKit

Product Versions
.NET net5.0 net5.0-windows net6.0 net6.0-android net6.0-ios net6.0-maccatalyst net6.0-macos net6.0-tvos net6.0-windows
.NET Core netcoreapp2.0 netcoreapp2.1 netcoreapp2.2 netcoreapp3.0 netcoreapp3.1
.NET Standard netstandard2.0 netstandard2.1
.NET Framework net452 net46 net461 net462 net463 net47 net471 net472 net48
MonoAndroid monoandroid
MonoMac monomac
MonoTouch monotouch
Tizen tizen40 tizen60
Xamarin.iOS xamarinios
Xamarin.Mac xamarinmac
Xamarin.TVOS xamarintvos
Xamarin.WatchOS xamarinwatchos
Compatible target framework(s)
Additional computed target framework(s)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (138)

Showing the top 5 NuGet packages that depend on MimeKit:

Package Downloads

MailKit is an Open Source cross-platform .NET mail-client library that is based on MimeKit and optimized for mobile devices. Features include: * HTTP, Socks4, Socks4a and Socks5 proxy support. * SASL Authentication via ANONYMOUS, CRAM-MD5, DIGEST-MD5, LOGIN, NTLM, OAUTHBEARER, PLAIN, SCRAM-SHA-1, SCRAM-SHA-256, SCRAM-SHA-512 and XOAUTH2. * A fully-cancellable SmtpClient with support for STARTTLS, 8BITMIME, BINARYMIME, ENHANCEDSTATUSCODES, SIZE, DSN, PIPELINING and SMTPUTF8. * A fully-cancellable Pop3Client with support for STLS, UIDL, APOP, PIPELINING, UTF8, and LANG. * A fully-cancellable ImapClient with support for ACL, QUOTA, LITERAL+, IDLE, NAMESPACE, ID, CHILDREN, LOGINDISABLED, STARTTLS, MULTIAPPEND, UNSELECT, UIDPLUS, CONDSTORE, ESEARCH, SASL-IR, COMPRESS, WITHIN, ENABLE, QRESYNC, SORT, THREAD, ANNOTATE, LIST-EXTENDED, ESORT, METADATA / METADATA-SERVER, NOTIFY, FILTERS, LIST-STATUS, SORT=DISPLAY, SPECIAL-USE / CREATE-SPECIAL-USE, SEARCH=FUZZY, MOVE, UTF8=ACCEPT / UTF8=ONLY, LITERAL-, APPENDLIMIT, STATUS=SIZE, OBJECTID, REPLACE, SAVEDATE, XLIST, and X-GM-EXT1. * Client-side sorting and threading of messages (the Ordinal Subject and the Jamie Zawinski threading algorithms are supported). * Asynchronous versions of all methods that hit the network. * S/MIME, OpenPGP, DKIM and ARC support via MimeKit. * Microsoft TNEF support via MimeKit.


netDumbster is a .Net Fake SMTP Server clone of the popular Dumbster (http://quintanasoft.com/dumbster/) netDumbster is based on the API of nDumbster (http://ndumbster.sourceforge.net/default.html) and the nice C# Email Server (CSES) written by Eric Daugherty.

cloudscribe.Email.Senders The ID prefix of this package has been reserved for one of the owners of this package by NuGet.org.

Classes that provide a common interface for sending email with smtp or popular email apis including SendGrid, Mailgun, and ElasticEmail


FMPC is a service with utilities such as standard messages, document validators and CDN for images and PDF.


MsgKit is a 100% managed C# .NET library (no PINVOKE or whatsoever) which may be used for the creation of messages (E-Mail, Appointments, Journals and Stickey Notes) that are Outlook compatible

GitHub repositories (27)

Showing the top 5 popular GitHub repositories that depend on MimeKit:

Repository Stars
Store securely encrypted backups in the cloud!
Practical samples of ASP.NET Core 2.1, 2.2, 3.1, 5.0, 6.0 and 7.0 projects you can use. Readme contains explanations on all projects.
Orchard Core is an open-source modular and multi-tenant application framework built with ASP.NET Core, and a content management system (CMS) built on top of that framework.
Clean Architecture Template for Blazor WebAssembly Built with MudBlazor Components.
Clean Architecture Template for .NET 6.0 WebApi built with Multitenancy Support.
Version Downloads Last updated
3.2.0 471,267 3/26/2022
3.1.1 727,501 1/30/2022
3.1.0 264,333 1/15/2022
3.0.0 635,474 12/11/2021
2.15.1 804,762 9/13/2021
2.15.0 2,683,550 8/19/2021
2.14.0 502,890 7/28/2021
2.13.0 1,422,603 6/12/2021
2.12.0 800,556 5/12/2021
2.11.0 1,490,336 3/12/2021
2.10.1 2,634,884 12/5/2020
2.10.0 1,212,784 11/21/2020
2.9.2 2,396,738 9/12/2020
2.9.1 2,262,908 7/11/2020
2.8.0 2,444,232 5/30/2020
2.7.0 238,337 5/19/2020
2.6.0 3,547,935 4/4/2020
2.5.2 786,475 3/14/2020
2.5.1 1,110,310 2/15/2020
2.5.0 803,692 1/18/2020
2.4.1 1,671,611 11/10/2019 117,724 11/5/2019
2.4.0 29,683 11/3/2019
2.3.2 377,615 10/12/2019
2.3.1 992,989 9/8/2019
2.3.0 564,959 8/24/2019
2.2.0 1,920,406 6/11/2019 865,922 5/13/2019
2.1.4 573,877 4/13/2019
2.1.3 1,061,451 2/24/2019
2.1.2 1,121,027 12/30/2018
2.1.1 175,321 12/16/2018
2.1.0 321,058 12/1/2018
2.0.7 452,012 10/28/2018
2.0.6 2,394,059 8/4/2018
2.0.5 458,048 7/7/2018
2.0.4 527,590 5/21/2018
2.0.3 458,812 4/14/2018
2.0.2 158,385 3/17/2018
2.0.1 1,320,617 1/6/2018
2.0.0 144,322 12/22/2017
1.22.0 602,106 11/24/2017
1.20.0 310,836 10/28/2017
1.18.1 597,377 9/3/2017
1.18.0 188,526 8/7/2017
1.16.2 447,227 7/1/2017
1.16.1 468,840 5/5/2017
1.16.0 109,490 4/21/2017
1.14.1 44,818 4/9/2017
1.14.0 104,975 4/9/2017
1.12.0 190,827 3/12/2017
1.10.1 148,265 1/28/2017
1.10.0 610,297 10/31/2016

* Always use a lowercase domain name in the Message-Id to work around bugs in eM Client. (issue #734)
* Improved handling of parsing Content-Types like "multipart/multipart/mixed; boundary=...". (issue #737)
* Added a maxLineLength argument to the QuotedPrintableEncoder .ctor.
* Added maxLineLength arguments to EncoderFilter.Create() methods.
* Fixed MimePart.Prepare() to remember the maxLineLength argument value for later use in the WriteTo() implementation. This maxLineLength value can then be passed to the Base64 or QuotedPrintable encoder so that it can properly limit lines to that length (up to a max of 76 characters as per the specs). (issue #743)
* Added net6.0 to the list of TargetFrameworks.