sendmail and exim4

["Valdir Marcos" <valdir.marcos@superig.com.br>]

init─┬─atd
     ├─bash
     ├─cron─┬─firebird
     │      └─sendmail
     ├─cron───cron─┬─sendmail
     │             └─sh───curl
     ├─dhclient
     ├─exim4

 

How can I discover what sendmail and exim4 are doing in my Debian Sarge?
Tho whom they send messages in a server that, theoricaly, neither have POP nor SMTP working?

 

Thanks,

 

Valdir