The TCP/IP Guide – TCP/IP Internet Message Access Protocol (IMAP/IMAP4) http://www.tcpipguide.com/free/t_TCPIPInternetMessageAccessProtocolIMAPIMAP4.htm
OpenSSL Expert Tips and Tricks: Test and Benchmark Servers http://www.openlogic.com/wazi/bid/188078/OpenSSL-Expert-Tips-and-Tricks-Test-and-Benchmark-Servers