help on postfix

hi … i want to do something "simple" im using postfix ..

and i want to be able to send mails with my domain.. and make that the users validate via sasl .. to use pop mail.

hope someone can help me because i try almost everything.

Thanks in advice

pp

here is the postconf -n

command_directory = /usr/sbin

config_directory = /etc/postfix

daemon_directory = /usr/libexec/postfix

debugpeerlevel = 2

mail_owner = postfix

mailq_path = /usr/bin/mailq

manpage_directory = /usr/share/man

mydestination = $myhostname, localhost.$mydomain, 6kbytes.com, franobarrio.com.ar

mydomain = 6kbytes.com

myhostname = mail.6kbytes.com

mynetworks = localhost

mynetworks_style = host

myorigin = 6kbytes.com

newaliases_path = /usr/bin/newaliases

queue_directory = /var/spool/postfix

readmedirectory = /usr/share/doc/postfix-1.1.12/READMEFILES

relay_domains = 6kbytes.com[18~

relayhost = $mydomain

sample_directory = /usr/share/doc/postfix-1.1.12/samples

sendmail_path = /usr/sbin/sendmail

setgid_group = postdrop

smtpdrecipientrestrictions = permitmynetworks,permitsaslauthenticated,checkrelay_domains

smtpdsaslauth_enable = yes

smtpdsasllocal_domain = $myhostname

smtpdsaslsecurity_options = noanonymous