sendmail

[rb]

I'm trying to send email, using sendmail, with authentication port 587 and
credentials.

I modified sendmail.mc as follows:
TRUST_AUTH_MECH(`EXTERNAL DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl
define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN
PLAIN')dnl
FEATURE(`authinfo',`hash /etc/mail/auth/client-info')dnl

DAEMON_OPTIONS(`Port=smtp, Name=MTA')dnl
DAEMON_OPTIONS(`Port=587, Name=MSA, M=E')dnl

the file client-info contains:
AuthInfo:smtp.auth.orange-business.com "U:<my_authentication>"
"P:<my_password>" "M:PLAIN"

I tried first to send an email via
telnet smtp.auth.orange-business.com 587
using the credentials above, which I encoded with Base64 Coder,
and it worked.

When I use
mail -s "my subject" <my email> < some_file
I get in /var/log/maillog:
Jul  8 07:54:09 godefroy sendmail[19322]: q685q9XO019320:
to=<roland at cat.be>, ctladdr=<roland at godefroy.fr> (504/500),
delay=00:02:00, xdelay=00:02:00, mailer=relay, pri=121220,
relay=smtp.auth.orange-business.com. [194.2.0.87], dsn=4.0.0,
stat=Deferred: Connection timed out with smtp.auth.orange-business.com.

When I start sendmail with:
/usr/sbin/sendmail -O LogLevel=14 -bd -X /tmp/output.log

the output.log file gives no errors, but mentions nowhere the authentication.

I'm trying to solve this for weeks now, but without result.

Can somebody help me?
sendmail-8.13.8-8.1.el5_7
sendmail-cf-8.13.8-8.1.el5_7

Thanks
Roland