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A cross-platform .NET library for IMAP, POP3, and SMTP
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What is MailKit?

It is a cross-platform mail client library built on top of MimeKit. The main goal of this project is to provide the .NET world with robust, fully featured and RFC-compliant SMTP, POP3, and IMAP client implementations.
MailKit is a tool in the Email API category of a tech stack.
MailKit is an open source tool with 5.2K GitHub stars and 757 GitHub forks. Here’s a link to MailKit's open source repository on GitHub

Who uses MailKit?

3 companies reportedly use MailKit in their tech stacks, including AspNet Zero, Langdon Systems NL, and triiyo.

12 developers on StackShare have stated that they use MailKit.

MailKit Integrations

MailKit's Features

  • SASL Authentication
  • Supports S/MIME v3.2
  • Supports OpenPGP
  • Supports DKIM-Signatures
  • Supports ARC signatures
  • All API's that might block allow canellation via CancellationToken
  • All API's that perform I/O have async variants
  • Client-side sorting and threading of messages
  • Supports .NET 4.5, .NETStandard 1.3, .NETStandard 1.6, .NETStandard 2.0, Xamarin.Android, Xamarin.iOS, Windows Phone 8.1, and more

MailKit Alternatives & Comparisons

What are some alternatives to MailKit?
Postal is a complete and fully featured mail server for use by websites & web servers. Think Sendgrid, Mailgun or Postmark but open source and ready for you to run on your own servers. Postal was developed by aTech Media to serve its own mail processing requirements and we have since decided that it should be released as an open source project for the community.
A full-featured email creation and transfer class for PHP. It is a class library for PHP that provides a collection of functions to build and send email messages. PHPMailer supports several ways of sending email: mail() , Sendmail, qmail & direct to SMTP servers.
It allows sending email directly from Javascript, with no backend development. The developers create one or more email templates (dynamic content supported) and then trigger an email using our Javascript SDK, specifying the template, and the dynamic parameters for rendering the email.
As soon as a mailbox is connected, we create a metadata index of its content starting from the most recent emails which become available from the API within seconds. Context.IO takes care of synching email data for your app so you don't have to build, scale and maintain this infrastructure yourself. Focus on what's unique to your business, we'll manage the technical details of integrating with arcane email server protocols. is a web-based email processing software which allows you to pull any kind of data from incoming e-mails based on custom parsing rules. The parsed data can be sent to any API with webhooks.
See all alternatives

MailKit's Followers
15 developers follow MailKit to keep up with related blogs and decisions.