MailKit is a cross-platform .NET library for IMAP, POP3, and SMTP client operations.
The library addresses the need for a comprehensive email client implementation in .NET by providing protocol support for receiving mail via IMAP and POP3, and sending mail via SMTP. It is built on top of MimeKit, which handles MIME message parsing and construction, allowing MailKit to focus on protocol implementation and client functionality.
MailKit suits .NET developers who need to integrate email capabilities into applications without relying on external mail servers or system-level email APIs. It works across Windows, Linux, and macOS. The project offers both standard and Lite package variants, with the Lite versions providing reduced dependencies for scenarios where a smaller footprint is needed. The library supports security features including DKIM, S/MIME, and PGP for signed and encrypted messages.
The project maintains active continuous integration across Linux, Mac, and Windows platforms with code coverage tracking and static analysis. Development activity shows consistent attention to quality assurance and cross-platform compatibility validation.
