MailBee.NET IMAP
MailBee.NET IMAP component enables .NET applications to receive, parse, upload, search and manage mail and folders on IMAP4 servers including Gmail. Supports TLS/SSL, S/MIME, proxy, Bayesian spam filter, DomainKeys/DKIM, HTML mail with embedded pictures, secure authentication (GSSAPI, NTLM), international charsets and UTF-8, multiple attachments, bounced message parser (DSN), XML, streams, IMAP SORT, XLIST and IDLE. Royalty-free distribution.