HI,
I use centos 5.7 .
I configure sendmail as client and delvier the email to the external SMTP server .
The smtp server need SMTP AUTH in order to send email with SMTP.

I configre and follow this link .
http://www.freelinuxtutorials.com/quick-tips-and-tricks/configure-sendmail-for-smtp-authentication/

I try to send email using sendmail to this smtp serve rbut failure with AUTH .

[root@localhost asterisk]# sendmail -f kingman.chui@broadsoft.com -v kingman.chui@broadsoft.com
subject:MMMM
MMMM
.
kingman.chui@broadsoft.com... Connecting to [10.1.1.176] via relay...
220 KINGMANNB ESMTP
>>> EHLO localhost.localdomain
250-KINGMANNB
250-SIZE 20480000
250 AUTH LOGIN PLAIN
>>> MAIL From:<kingman.chui@broadsoft.com> SIZE=18 AUTH=kingman.chui@broadsoft.com
250 OK
>>> RCPT To:<kingman.chui@broadsoft.com>
530 SMTP authentication is required.
>>> RSET
250 OK
>>> RSET
250 OK
kingman.chui@broadsoft.com... Using cached ESMTP connection to [10.1.1.176] via relay...
>>> MAIL From:<> SIZE=1042
250 OK
>>> RCPT To:<kingman.chui@broadsoft.com>
530 SMTP authentication is required.
>>> RSET
250 OK
>>> RSET
250 OK
postmaster... Using cached ESMTP connection to [10.1.1.176] via relay...
>>> MAIL From:<> SIZE=2066
250 OK
>>> RCPT To:<postmaster@localhost.localdomain>
530 SMTP authentication is required.
>>> RSET
250 OK
Closing connection to [10.1.1.176]
>>> QUIT
221 goodbye
=========
[root@localhost mail]# cat authinfo
AuthInfo:10.1.1.176 "U:kingman.chui@broadsoft.com""I:kingman.chui@broadsoft.com""P:123456" "M:LOGIN PLAIN"
AuthInfo: "U:kingman.chui@broadsoft.com""P:123456" "M:LOGIN PLAIN"
[root@localhost mail]# pwd
/etc/mail
[root@localhost mail]#


So, please advice what is the problem in sendmail in order to configure the smtp ATUH client ...

Thank
Regard/chui king man