MimeKit 2.15.1

There is a newer version of this package available.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 2.15.1
dotnet add package MimeKit --version 2.15.1
<PackageReference Include="MimeKit" Version="2.15.1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add MimeKit --version 2.15.1
The NuGet Team does not provide support for this client. Please contact its maintainers for support.
#r "nuget: MimeKit, 2.15.1"
#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=2.15.1

// Install MimeKit as a Cake Tool
#tool nuget:?package=MimeKit&version=2.15.1
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

NuGet packages (125)

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.


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


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


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 (25)

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

Repository Stars
Store securely encrypted backups in the cloud!
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.
smtp4dev - the fake smtp email server for development and testing
A .NET MIME creation and parser library with support for S/MIME, PGP, DKIM, TNEF and Unix mbox spools.
Version Downloads Last updated
3.1.0 15,136 1/15/2022
3.0.0 191,830 12/11/2021
2.15.1 409,721 9/13/2021
2.15.0 1,343,240 8/19/2021
2.14.0 395,219 7/28/2021
2.13.0 1,087,514 6/12/2021
2.12.0 653,247 5/12/2021
2.11.0 1,234,049 3/12/2021
2.10.1 2,125,152 12/5/2020
2.10.0 1,011,031 11/21/2020
2.9.2 2,101,281 9/12/2020
2.9.1 1,989,097 7/11/2020
2.8.0 2,159,702 5/30/2020
2.7.0 213,470 5/19/2020
2.6.0 2,953,249 4/4/2020
2.5.2 688,699 3/14/2020
2.5.1 991,569 2/15/2020
2.5.0 725,737 1/18/2020
2.4.1 1,534,351 11/10/2019 108,694 11/5/2019
2.4.0 27,346 11/3/2019
2.3.2 349,773 10/12/2019
2.3.1 933,024 9/8/2019
2.3.0 531,738 8/24/2019
2.2.0 1,811,112 6/11/2019 801,527 5/13/2019
2.1.4 540,550 4/13/2019
2.1.3 999,361 2/24/2019
2.1.2 1,054,599 12/30/2018
2.1.1 170,832 12/16/2018
2.1.0 306,010 12/1/2018
2.0.7 408,173 10/28/2018
2.0.6 2,185,628 8/4/2018
2.0.5 411,126 7/7/2018
2.0.4 497,629 5/21/2018
2.0.3 429,213 4/14/2018
2.0.2 152,910 3/17/2018
2.0.1 1,225,611 1/6/2018
2.0.0 138,847 12/22/2017
1.22.0 538,224 11/24/2017
1.20.0 302,493 10/28/2017
1.18.1 574,008 9/3/2017
1.18.0 174,531 8/7/2017
1.16.2 437,544 7/1/2017
1.16.1 438,867 5/5/2017
1.16.0 107,318 4/21/2017
1.14.1 43,659 4/9/2017
1.14.0 101,279 4/9/2017
1.12.0 186,320 3/12/2017
1.10.1 144,815 1/28/2017
1.10.0 597,887 10/31/2016

* Improved MimeParser to be a little more efficient based on work being done for the upcoming v3.0 release.
* Fixed a bug in the MimeParser exposed by added unit tests regarding Content-Length handling.
* Improved address parser error messages.
* Fixed MailboxAddress.Address to be forgiving if there is trailing whitespace after the addr-spec token when setting MailboxAddress.Address. (issue #705)
* Fixed MimeMessage and MimeEntity.ToString() to not write a newline before the message/entity (regression introduced in 2.14.0).