grinay 

TcpClient , Socket client with proxy support HTTP, SOCKS4, SOCKS4a, SOCKS5

My package description.

Email Validation Library for .NET. Verifies thousands of emails with multiple threads. Features: Mailbox Check, RFC 821 Syntax Check, Top Level Domain Check, Fake Email Pattern Matching, Disposable Email Detection, Free Email Detection, Grey Listing Detection, Black Listing Detection, Curse Word... More information