[exim] Ident stopping

Hi There,

How can I Disable exim from doing an ident lookup on smtp connection?

Apr 7 08:51:26 spamstop exim[3380]: 2005-04-07 08:51:26 SMTP connection from [xxx.xx.xxx.xx]:1061 I=[xxx.xx.xxx.xx]:25 (TCP/IP connection count = 1)
Apr 7 08:51:56 spamstop exim[3454]: 2005-04-07 08:51:56 ident connection to xxx.xx.xxx.xx timed out


Thanks,
Michael