1.)
I have a query about Sendmail that why we need DNS for Sendmail, whereas it can also run with default configuration with No DNS
2.)
Is sendmail can be configured as Mail Router as well as Mail Server for Local Users. If Yes. Pl. give me logic behind it, that how it will deferentiate between internet mail account (Global account

and Local Users mail account.
3.)
Can we see the log report of Internet Uses Using Squid Proxy.