[exim] 421 SMTP command timeout - closing connection ISSUE

Hi guys ,,

Im getting the following error in my EXIM mail server when i telnet in to
it ..

OS is Debina squeeze 6 and using exim split configuration model

i found out that want to increase the "smtp_accept_max" value to Fix the
"421 SMTP error"

where do i need to put the "smtp_accept_max=" configuration in exim ? is
it in "/etc/exim4/conf.d/main/02_exim4-config_options " File

Please advice


Thank you