MimeKit 3.2.0

.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There is a newer version of this package available.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 3.2.0
dotnet add package MimeKit --version 3.2.0
<PackageReference Include="MimeKit" Version="3.2.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add MimeKit --version 3.2.0
The NuGet Team does not provide support for this client. Please contact its maintainers for support.
#r "nuget: MimeKit, 3.2.0"
#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=3.2.0

// Install MimeKit as a Cake Tool
#tool nuget:?package=MimeKit&version=3.2.0
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 (140)

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.

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


Package Description

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
3.3.0 94,784 6/11/2022
3.2.0 1,046,917 3/26/2022
3.1.1 923,119 1/30/2022
3.1.0 308,694 1/15/2022
3.0.0 754,484 12/11/2021
2.15.1 930,833 9/13/2021
2.15.0 3,149,157 8/19/2021
2.14.0 540,152 7/28/2021
2.13.0 1,529,460 6/12/2021
2.12.0 853,001 5/12/2021
2.11.0 1,578,457 3/12/2021
2.10.1 2,823,739 12/5/2020
2.10.0 1,285,168 11/21/2020
2.9.2 2,492,115 9/12/2020
2.9.1 2,343,948 7/11/2020
2.8.0 2,695,531 5/30/2020
2.7.0 245,226 5/19/2020
2.6.0 3,734,279 4/4/2020
2.5.2 805,911 3/14/2020
2.5.1 1,149,136 2/15/2020
2.5.0 837,813 1/18/2020
2.4.1 1,718,309 11/10/2019 124,373 11/5/2019
2.4.0 30,850 11/3/2019
2.3.2 388,649 10/12/2019
2.3.1 1,014,980 9/8/2019
2.3.0 574,399 8/24/2019
2.2.0 1,952,907 6/11/2019 887,903 5/13/2019
2.1.4 585,695 4/13/2019
2.1.3 1,082,313 2/24/2019
2.1.2 1,143,229 12/30/2018
2.1.1 178,245 12/16/2018
2.1.0 327,048 12/1/2018
2.0.7 463,811 10/28/2018
2.0.6 2,448,104 8/4/2018
2.0.5 478,125 7/7/2018
2.0.4 536,759 5/21/2018
2.0.3 468,214 4/14/2018
2.0.2 160,841 3/17/2018
2.0.1 1,351,282 1/6/2018
2.0.0 146,856 12/22/2017
1.22.0 620,878 11/24/2017
1.20.0 313,517 10/28/2017
1.18.1 605,462 9/3/2017
1.18.0 192,351 8/7/2017
1.16.2 450,470 7/1/2017
1.16.1 482,834 5/5/2017
1.16.0 110,574 4/21/2017
1.14.1 45,332 4/9/2017
1.14.0 107,128 4/9/2017
1.12.0 192,035 3/12/2017
1.10.1 149,926 1/28/2017
1.10.0 614,771 10/31/2016

* When initializing character encodings for netstandard and net50/net60, wrap the Reflection logic to invoke System.Text.Encoding.RegisterProvider() in a try/catch to prevents exceptions when using the netstandard version of MimeKit in a .NET Framework app. (issue #751)
* Added a work-around for Office365 `message/delivery-status` parts where all status groups after the first are base64 encoded. This seems to be a bug in Office365 where it treats the first status group as MIME entity and the following status groups as the content. (issue #250)
* Fixed the MimeMessage .ctor that takes object parameters to first check that a Message-Id header was not supplied before generating one for the message. (issue #747)
* Fixed the BestEncodingFilter logic such that if any line in binary content is > 998 and it contains nul bytes, it should recommend base64 (not quoted-printable).