where sendmail stores received emails

I compiled again the sendmail.mc file by commenting with the following line DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')  so created a new sendmail.mc file. Now after i put a entry in /etc/mail/access file for my domain it allows sending to all email addresses that end with that domain. So it accepts email. But i cannot see where the emails accepted are stored. Another redhat user told me that i should have mailbox folders under /var/spool/mail but i do not see any of them. So the strange thing is that sendmail accepts the local mail but i do not know where emails are stored. I'm using a copy of Redhat 7.1 that came together with the Complete reference of Linux (Redhat 7.1 and Caldera). Is any problem with that ? I even reinstalled Redhat on my machine as a server but still the same thing. I was told that if i install REdhat 7.1 as a server, it's not possible to login in graphical mode. But actually it installed X Window and KDE and Gnome. Is anything wrong with that!
 
 ?

But more concerned i'm about Sendmail. Where does it store the email it receives. They are not in queue either

Any idea what's happenning ?

Also i declared a MX entry in BIND for my email server, but i do not have any forward options there. So i'm just curious since i haven't gone at that point yet, what do i need to do in order to forward email on internet. Just declare some forward options on BIND named.conf and  uncomment the following line on sendmail.mc file 

dnl FEATURE(`relay_based_on_MX')dnl

or do something else on sendmail in order to relay email into another SMTP server ?

Thanks



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