c1d12e9c_Port_Forwarding_using_PuTTY__Destination_Host
[Service] IMAP [Listening Port] 143 [Destination Port] 143 yes [How to run client] enter localhost as IMAP server for your mail client software [Destination Host] 
study.cs.hku.hk for student staff.cs.hku.hk for teaching staff
Port Forwarding using PuTTY
Destination Host