After new install, I can't email from a remote (yahoo.com, etc) ?

Hi, Please help?
After a new debian-6.0.6 install, I can not email from my yahoo account to my dovecot/isp account? I did get errors earlier similar to the ones the link below is showing:

http://www.howtoforge.com/postfix-d...private-auth-failed-no-such-file-or-directory


I included the /var/spool/postfix in my main.cf but nothing has changed yet (can not email from yahoo.com). Please give some directions.

Note: I was able to email to yahoo.com using "/usr/sbin/sendmail -v [email protected]</dev/null"

thank you.

 

Can you post the error messages from your mail log?

 

mail.logs to determine why can't email from remote systems like yahoo.com

*SOLVED*

I pointed my DNS, MX record to the right "mailserver" .

Thanks to all who paid attention.