MailBee.NET IMAP component enables .NET applications to receive, parse, upload, search and manage mail and folders on IMAP4 servers including Gmail and MS Exchange.

The key features:

quick methods for receiving mail with a single line of code;
IDLE, XLIST, SPECIAL-USE, SORT, UIDPLUS, QUOTA, NAMESPACE, LITERAL+ supported;
self-learning Bayesian spam filter;
secure TLS/SSL connections, up to TLS 1.2;
OAuth 2.0
connections via a proxy server (SOCKS4/SOCKS5/HTTP);
S/MIME and certificates;
DomainKeys and DKIM;
download entire messages, headers only, headers + part of body, envelopes, custom FETCH requests;
copy and move messages between folders;
IMAP namespaces;
search, flag, delete, expunge, upload messages;
download and manage folders, detect special folders like Drafts;
international folder names;
get account quota and used space size (if the server supports QUOTA);
can tolerate badly formatted responses from the server;
MS-TNEF (winmail.dat) attachments supported;
accurate and flexible MIME parser;
powerful HTML parser;
view and preprocess HTML mails with embedded pictures;
HTML-to-PlainText conversion and vice versa;
secure and user-defined authentication (including NTLM and GSSAPI);
Windows Integrated Authentication (authenticate using the current Windows user credentials);
TO/CC/BCC, international charsets, UTF-8, custom headers, custom message formats (e.g. meeting request items);
access to every MIME part;
import from and export to .EML and Outlook .MSG files, streams, XML, System.Net.Mail.MailMessage;
integration with Smtp component;
events and error handling features, memory/file logging, debug functions;
async/await methods.

The DLL is completely written in C# (no external COM dependencies). Supports .NET 2.0/3.0/3.5/4.0/4.5+ (Client Profile compatible), .NET Core 1.0/1.1, Xamarin (Android/iOS), UWP (Universal Windows). Can be used in desktop, console and ASP.NET applications developed in C#/VB.NET/etc.

Samples: C# and VB.NET, WinForms and ASP.NET, .NET 2.0+ and .NET 4.5+.

Royalty-free distribution allowed.