Swilting wrote on Fri, 26 Dec 2008 11:58:05 +0100:
I have to try to change the option pam present in the file
in plain login
but after impossible to restart
This is wrong. You probably edited MECH= This sets the method for checking the password not the SASL encryption method. You probably want to add plain and login to the the allowed SASL authentication mechanisms. Set this back to what it was before or to MECH=shadow (this is how it works for me on CentOS 4). Make sure that /usr/lib/sasl2/Sendmail.conf contains the line pwcheck_method: pwcheck saslauthd and check that a helo contains this line: 250-AUTH PLAIN LOGIN (how to do this is shown on Claus' page under "Initial test").
ps:Excuse my bad English I am French
There is a French list and you should use that if your MTA still doesn't SMTP AUTH now. You will probably need to edit your sendmail.mc file. Add the ehlo output from above to your explanation there, and your CentOS version.
Kai