[Exim] Connections from 141.3.10.80

Who or what exactly is this:
2003-07-06 11:04:42 SMTP connection from iramx1.ira.uni-karlsruhe.de
[141.3.10.80] (TCP/IP connection count = 1)
2003-07-06 11:04:43 SMTP connection from iramx1.ira.uni-karlsruhe.de
[141.3.10.80] closed by QUIT

--
Lab tests show that use of micro$oft causes cancer in lab animals