LinuxQuestions.org - Sendmail Auth + Relay

I'm currently running a Slackware 13.0 server configured with Sendmail 8.14.3 and Dovecot 1.1.15. So far I have users able to authenticate and check mail, move messages betwixt folders, and send to other users on the domain.

Unfortunately, I am as of yet unable to have these users send mail to other domains, even after authenticating (IMAP is the preferred protocol). I've seen a lot of how-to's, especially here on LQ (and in the Slackware forum specifically), but have been unable to replicate others' success, save for exposing myself as an open relay (which is certainly not optimal by any stretch of the imagination).

Below is a selection from my primary configuration cf file:

Code:

include(`../m4/cf.m4')                                                  

VERSIONID(`Poetics setup for Slackware Linux')dnl                      

OSTYPE(`linux')dnl                                                      

define(`confPRIVACY_FLAGS', `authwarnings,novrfy,noexpn,restrictqrun,goaway')dnl

define(`SMART_HOST',`mail.myisp.net')dnl                                        

define(`confTO_IDENT', `0')dnl                                                  

define(`confAUTH_MECHANISMS', `DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl            

TRUST_AUTH_MECH(`DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl                          

define(`confCACERT_PATH', `/etc/mail/certs')dnl                                

define(`confCACERT', `/etc/mail/certs/cacert.pem')dnl                          

define(`confSERVER_CERT', `/etc/mail/certs/sendmail.pem')dnl                    

define(`confSERVER_KEY', `/etc/mail/certs/sendmail.pem')dnl                    

define(`confCLIENT_CERT', `/etc/mail/certs/sendmail.pem')dnl

define(`confCLIENT_KEY', `/etc/mail/certs/sendmail.pem')dnl

define(`confAUTH_OPTIONS', `A p y')dnl

FEATURE(`use_cw_file')dnl

FEATURE(`use_ct_file')dnl

FEATURE(`mailertable',`hash -o /etc/mail/mailertable.db')dnl

FEATURE(`virtusertable',`hash -o /etc/mail/virtusertable.db')dnl

FEATURE(`access_db', `hash -T<TMPF> /etc/mail/access')dnl

FEATURE(`blacklist_recipients')dnl

FEATURE(`local_procmail',`',`procmail -t -Y -a $h -d $u')dnl

FEATURE(`always_add_domain')dnl

FEATURE(`redirect')dnl

EXPOSED_USER(`root')dnl

LOCAL_DOMAIN(`localhost.localdomain')dnl

MAILER(local)dnl

MAILER(smtp)dnl

MAILER(procmail)dnl

My end-goal is to not allow unauthenticated users any access, but to allow those who have accounts access to send mail to anyone they'd like. I'm not sure if the smart host forwards in the case of other permission denials, but it is currently not working as I would expect either.

Thanks in advance for any ideas you can send my way -- this is my first foray into Sendmail and I'm certainly enjoying how powerful it is, but will be much happier when it's up and running.