MailKit 3.2.0

Prefix Reserved
.NET 5.0 This package targets .NET 5.0. The package is compatible with this framework or higher. .NET Standard 2.0 This package targets .NET Standard 2.0. The package is compatible with this framework or higher. .NET Framework 4.5.2 This package targets .NET Framework 4.5.2. The package is compatible with this framework or higher.
There is a newer version of this package available.
See the version list below for details.

Requires NuGet 2.12 or higher.

dotnet add package MailKit --version 3.2.0
                    


                    

                
NuGet\Install-Package MailKit -Version 3.2.0
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="MailKit" Version="3.2.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="MailKit" Version="3.2.0" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="MailKit" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add MailKit --version 3.2.0
                    


                    

                
#r "nuget: MailKit, 3.2.0"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package MailKit@3.2.0
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=MailKit&version=3.2.0
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=MailKit&version=3.2.0
                    


                            Install as a Cake Tool

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.

Product Compatible and additional computed target framework versions.
.NET net5.0 is compatible.  net5.0-windows was computed.  net6.0 is compatible.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed.  net9.0 was computed.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 was computed.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
.NET Core netcoreapp2.0 was computed.  netcoreapp2.1 was computed.  netcoreapp2.2 was computed.  netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.0 is compatible.  netstandard2.1 is compatible. 
.NET Framework net452 is compatible.  net46 was computed.  net461 is compatible.  net462 was computed.  net463 was computed.  net47 is compatible.  net471 was computed.  net472 was computed.  net48 is compatible.  net481 was computed. 
MonoAndroid monoandroid was computed. 
MonoMac monomac was computed. 
MonoTouch monotouch was computed. 
Tizen tizen40 was computed.  tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
Xamarin.Mac xamarinmac was computed. 
Xamarin.TVOS xamarintvos was computed. 
Xamarin.WatchOS xamarinwatchos was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (1.2K)

Showing the top 5 NuGet packages that depend on MailKit:

Package Downloads
Umbraco.Cms.Infrastructure

Contains the infrastructure assembly needed to run Umbraco CMS.
NETCore.MailKit

MailKit extension for asp.net core. Easy send email in asp.net core project.
Serilog.Sinks.Email

Send Serilog events as SMTP email using MailKit.
Abp.MailKit

Abp.MailKit
NLog.MailKit

NLog Mail Target for .NET Core & .NET Standard 2.0+ using MailKit. This package add the mail target to NLog and has the same options* as the original Mail Target. If the mail target was already available on your platform, this package will overwrite the original Mail Target. * Compared to the original MailTarget, the following options aren't implemented: - NTLM auth * MailKit gives more control of the sockets, so you get the `secureSocketOption` option for free!

GitHub repositories (146)

Showing the top 20 popular GitHub repositories that depend on MailKit:

Repository Stars
ardalis/CleanArchitecture
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duplicati/duplicati
Store securely encrypted backups in the cloud!
Sonarr/Sonarr
Smart PVR for newsgroup and bittorrent users.
Radarr/Radarr
Movie organizer/manager for usenet and torrent users.
aspnetboilerplate/aspnetboilerplate
ASP.NET Boilerplate - Web Application Framework
dodyg/practical-aspnetcore
Practical samples of ASP.NET Core 10, 9, 8.0, 7.0, 6.0, 5.0, 3.1, 2.2, and 2.1,projects you can use. Readme contains explanations on all projects.
nopSolutions/nopCommerce
ASP.NET Core eCommerce software. nopCommerce is a free and open-source shopping cart.
Kareadita/Kavita
Kavita is a fast, feature rich, cross platform reading server. Built with the goal of being a full solution for all your reading needs. Setup your own server and share your reading collection with your friends and family.
OrchardCMS/OrchardCore
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.
btcpayserver/btcpayserver
Accept Bitcoin payments. Free, open-source & self-hosted, Bitcoin payment processor.
fullstackhero/dotnet-starter-kit
Production Grade Cloud-Ready .NET 10 Starter Kit (Web API + Blazor Client) with Multitenancy Support, and Clean/Modular Architecture that saves roughly 200+ Development Hours! All Batteries Included.
Prowlarr/Prowlarr
Prowlarr is an indexer manager/proxy built on the popular *arr .net/reactjs base stack to integrate with your various PVR apps, supporting management of both Torrent Trackers and Usenet Indexers.
win-acme/win-acme
Automate SSL/TLS certificates on Windows with ease
umbraco/Umbraco-CMS
Umbraco is a free and open source .NET content management system helping you deliver delightful digital experiences.
immense/Remotely
A remote control and remote scripting solution, built with .NET 8, Blazor, and SignalR.
Lidarr/Lidarr
Looks and smells like Sonarr but made for music.
simplcommerce/SimplCommerce
A simple, cross platform, modulith ecommerce system built on .NET
jamesmh/coravel
Near-zero config .NET library that makes advanced application features like Task Scheduling, Caching, Queuing, Event Broadcasting, and more a breeze!
Version Downloads Last Updated
4.14.1 1,185,990 10/13/2025
4.14.0 583,335 9/28/2025
4.13.0 3,455,581 6/25/2025
4.12.1 1,742,003 5/17/2025
4.12.0 1,056,701 4/29/2025
4.11.0 3,369,991 3/9/2025
4.10.0 2,901,441 1/26/2025
4.9.0 3,225,399 12/10/2024
4.8.0 7,681,182 9/29/2024
4.7.1.1 7,333,329 7/15/2024
4.7.1 592,898 7/12/2024
4.7.0 799,938 6/29/2024
4.6.0 3,063,704 5/17/2024
4.5.0 2,069,085 4/13/2024
4.4.0 2,839,789 3/2/2024
4.3.0 8,520,961 11/11/2023
4.2.0 3,684,924 9/2/2023
4.1.0 4,713,791 6/17/2023
4.0.0 3,494,994 4/15/2023
3.6.0 3,238,285 3/4/2023
3.5.0 2,860,581 1/28/2023
3.4.3 4,116,244 11/25/2022
3.4.2 2,661,971 10/24/2022
3.4.1 2,342,623 9/12/2022
3.4.0 367,740 9/5/2022
3.3.0 6,359,742 6/12/2022
3.2.0 12,052,463 3/26/2022
3.1.1 4,639,182 1/30/2022
3.1.0 944,335 1/15/2022
3.0.0 3,781,249 12/11/2021
2.15.0 13,079,933 8/19/2021
2.14.0 965,145 7/28/2021
2.13.0 3,100,192 6/12/2021
2.12.0 1,476,337 5/12/2021
2.11.1 2,674,326 3/16/2021
2.11.0 181,974 3/12/2021
2.10.1 6,026,023 1/2/2021
2.10.0 3,648,041 11/21/2020
2.9.0 3,617,142 9/12/2020
2.8.0 3,717,598 7/11/2020
2.7.0 3,406,588 5/30/2020
2.6.0 8,993,821 4/4/2020
2.5.2 1,464,146 3/14/2020
2.5.1 1,543,300 2/15/2020
2.5.0 1,267,881 1/18/2020
2.4.1 2,471,259 11/10/2019
2.4.0.1 124,644 11/5/2019
2.4.0 31,961 11/3/2019
2.3.2 568,106 10/12/2019
2.3.1.6 1,296,381 9/9/2019
2.3.1 109,081 9/8/2019
2.3.0 762,509 8/24/2019
2.2.0 2,522,409 6/11/2019
2.1.5.1 1,026,707 5/13/2019
2.1.4 691,009 4/13/2019
2.1.3 1,334,425 2/24/2019
2.1.2 1,458,392 12/30/2018
2.1.1 223,668 12/17/2018
2.1.0.3 228,818 12/7/2018
2.0.7 962,734 10/28/2018
2.0.6 3,113,066 8/4/2018
2.0.5 525,976 7/7/2018
2.0.4 818,523 5/25/2018
2.0.3 780,039 4/15/2018
2.0.2 243,787 3/18/2018
2.0.1 1,815,193 1/6/2018
2.0.0 218,101 12/22/2017
1.22.0 734,929 11/24/2017
1.20.0 623,745 10/28/2017
1.18.1.1 775,795 9/4/2017
1.18.1 26,687 9/3/2017
1.18.0 225,618 8/7/2017
1.16.2 537,747 7/1/2017
1.16.1 740,262 5/5/2017
1.16.0 97,198 4/21/2017
1.14.2 51,797 4/12/2017
1.12.0 266,064 3/12/2017
1.10.2 239,504 1/28/2017
1.10.1 194,726 12/4/2016
1.10.0 494,690 10/31/2016

* Do not use ApplicationProtocols with SSL. (issue #1352)
* Updated GMail, Yahoo, and Outlook.com certificates.
* Lazy-initialize MessageSummary.Keywords. This reduces memory usage when the client isn't requesting Flags/Keywords.
* Hard-cache some IMAP FETCH-related tokens in order to relieve GC pressure for commands like FETCH where there can be a LOT of responses containing the same tokens over and over again.
* Converted some IMAP async Task methods to use ValueTask to reduce GC pressure.
* Reduced string allocations in the IMAP logic by avoiding use of ToUpperInvariant().
* Added non-async implementations for ImapStream APIs to be used by the synchronous public APIs to avoid some async overhead.
* Reduce MemoryStream (and thus byte[]) allocations by using a new ByteArrayBuilder.
* Rewrote the IMAP CAPABILITY parser to avoid allocating strings.
* Fixed some cases where IMAP NIL tokens were not compared case insensitively.
* Always include the VERSION block in NTLM messages. (issue #1340)
* Target .NET Framework v4.6.1 instead of v4.6 to match the changes in MimeKit.
* Capture the Socket timeout value in Read/WriteAsync() to have it in case of exceptions. (issue #1327)