Hello Alex, For the mc file : define(`confAUTH_OPTIONS', `A')dnl TRUST_AUTH_MECH(`EXTERNAL DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl define(`confAUTH_MECHANISMS', `EXTERNAL GSSAPI DIGEST-MD5 CRAM-MD5 LOGIN PLAIN')dnl But now, we just found the IP address of smtp is blocked by the CBL of http://cbl.abuseat.org/... So, is there any solution ? Edward. Alexander Dalloz wrote: 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 |