edwardspl@xxxxxxxxxx schrieb: > Hello Alex, > > I just found the method ( the setting of mc file ) is fail ( password is > correct, but auth is fail )... > So, any more help ? > > Edward. Please be specific about your setup! Does saslauthd run (given that you use that)? service saslauthd status cat /etc/sysconfig/saslauthd cat /usr/lib/sasl2/Sendmail.conf egrep -v '^#|^$' /etc/mail/sendmail.mc Does testsaslauthd succeed? What is the exact logging of the AUTH error? Maybe increase the default LOG_LEVEL from 9 to 15. Alexander