STMP Auth Failure

[rcurts at robincurts.com]

I hope I am posting to the correct list.

I have been trying to set up SMTP and POP3 on a FC3 installation. I have
pop3 working fine and can download my email using outlook or thunderbird.

Sending email is a different story. I have read about 50 web pages about
setting up smtp authentication and they all say (generally) the same
thing, but don't help me out.  I am getting relaying denied errors when I
try to send any email from Outlook or Thunderbird.

I CAN send mail to <my_username>@<hostname_of_box>.com ... but if i send
to an outside domain I get the error.

The AUTH section of my sendmail.mc file:

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

When I get a mail failure i get this from /var/log/maillog:

Feb  4 11:59:34 localhost pop3-login: Login: rcurts [::ffff:4.8.55.148]
Feb  4 11:59:36 localhost sendmail[7892]: j14GxW9N007892:
from=<rcurts at intrastudios.com>, size=0, class=0, nrcpts=0, proto=ESMTP,
daemon=MTA, relay=[4.8.55.148]


I put up my sendmail.mc at
http://www.intrastudios.com/docs/sendmail.mc.txt in case someone had a
thought of something that might be wrong in that file.

I hope someone has a suggestion. :)

Cheers,
Robin Curts