Email
File Format APIs for .NET
Open Source .NET APIs for Email Files
Read, Write & Extract Attachments from MSG & EML files via .NET.
Email File Format APIs for .NET Include
MSGReader
Open Source C# .NET library that supports reading Outlook MSG and EML files without installing MS outlook. You can easily read properties from an Outlook MSG and EML messages.
MimeKit
Free .NET library for MIME creation and parsing to create messages, encrypt or decrypt messages, add attachments to Email messages inside .NET applications.
MailKit
Open Source C# .NET library for generating message with attachments or encrypt/decrypt messages with PGP/MIME and ARC signatures.