Bloody spammers

2013-08-13 14:51:38 H=<censored>.hinet.net (ylmf-pc) [<also censored>] rejected AUTH LOGIN: Please use encryption for authentication!
2013-08-13 14:51:44 H=<censored>.hinet.net (ylmf-pc) [<also censored>] rejected AUTH LOGIN: Please use encryption for authentication!
2013-08-13 14:51:51 H=<censored>.hinet.net (ylmf-pc) [<also censored>] rejected AUTH LOGIN: Please use encryption for authentication!
2013-08-13 14:51:58 H=<censored>.hinet.net (ylmf-pc) [<also censored>] rejected AUTH LOGIN: Please use encryption for authentication!
2013-08-13 14:52:04 H=<censored>.hinet.net (ylmf-pc) [<also censored>] rejected AUTH LOGIN: Please use encryption for authentication!
2013-08-13 14:52:11 H=<censored>.hinet.net (ylmf-pc) [<also censored>] rejected AUTH LOGIN: Please use encryption for authentication!
2013-08-13 14:52:18 H=<censored>.hinet.net (ylmf-pc) [<also censored>] rejected AUTH LOGIN: Please use encryption for authentication!
2013-08-13 14:52:25 H=<censored>.hinet.net (ylmf-pc) [<also censored>] rejected AUTH LOGIN: Please use encryption for authentication!
2013-08-13 14:52:32 H=<censored>.hinet.net (ylmf-pc) [<also censored>] rejected AUTH LOGIN: Please use encryption for authentication!

Thank god for firewalls.