unable to connect to mail server

I am having a problem where users outside our network are unable to send
mail off or our server - error "unable to connect to mail server." Users
outside the network are using dial-up accounts and Microsoft Outlook.
I thought this might be a relay problem, so I added a users IP to the access
table, told it to relay, makemap hash, and then restarted mail. The user is
still unable to connect.

They are able to receive their mail (POP or IMAP) but they cannot sendmail
off of our server.

I am using the program dracd and this program was working for a while.
"DRAC will allow users who successfully authenticate via POP3, (ie.  check
their mail) to relay through your mail server for a preset duration,
currently a default of 30 minutes.  After the authentication part of a
successful mail check, the POP3 daemon calls the dracauth()function to
update an internal database with the originating IP address of the user.
Each time a relay is attempted, sendmail will consult this same database to
verify permission."


I am also trying to use SMTP_AUTH, from the sendmail.mc:

dnl define(`confAUTH_OPTIONS', `A p')dnl
define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN
PLAIN')
TRUST_AUTH_MECH(`EXTERNAL DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl

when I telnet localhost 25:
220 red.cmsmechanical.com ESMTP Sendmail 8.12.8/8.12.8; Mon, 26 Jan 2004
09:25:38 -0500
ehlo domain
250-red.cmsmechanical.com Hello red [127.0.0.1], pleased to meet you
250-ENHANCEDSTATUSCODES
250-PIPELINING
250-8BITMIME
250-SIZE
250-DSN
250-ETRN
250-STARTTLS
250-DELIVERBY
250 HELP
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