Strange Things In maillog - ???

[Jesse Sunday]

Hello all, just noticed these in my logs (over and over again)  -  I eventually denied all ip access (incoming)  -  Have any of you seen this before???   What was happening???    Below are the contents of my 'maillog'  -  Thanks!!!     tcpserver: pid 49682 from 203.252.5.27 tcpserver: ok 49682 flashburn-x.parview.com:192.168.16.3:25 1tym.chollian.net:203.252.5.27::4196 tcpserver: end 49682 status 256 tcpserver: status: 0/40 tcpserver: status: 1/40 tcpserver: pid 49684 from 203.252.5.27 tcpserver: ok 49684 flashburn-x.parview.com:192.168.16.3:25 1tym.chollian.net:203.252.5.27::2942 tcpserver: end 49684 status 256 tcpserver: status: 0/40 tcpserver: status: 1/40 tcpserver: pid 49687 from 203.252.5.27 tcpserver: ok 49687 flashburn-x.parview.com:192.168.16.3:25 1tym.chollian.net:203.252.5.27::3538 tcpserver: end 49687 status 256 tcpserver: status: 0/40 tcpserver: status: 1/40 tcpserver: pid 49689 from 203.252.5.27 tcpserver: ok 49689 flashburn-x.parview.com:192.168.16.3:25 1tym.chollian.net:203.252.5.27::4324 tcpserver: end 49689 status 256 tcpserver: status: 0/40