Hello, The default FC4 smtp/pop3 login authentication (sendmail auth login and dovecot login = pop3) will check userid/password against the password file located at /etc/passwd. I am just wondering if it is possible to modify the configuration parameters such that the login authentication can check userid/password against the password file, /etc/sasldb2, created via saslpasswd2(cyrus-sasl v2). I have just made a fresh installation of FC4 with package group selection of everything. My Sendmail/Dovecot configuration parameters are modified from the defaults as follows. /etc/mail/sendmail.mc define(`confLOG_LEVEL', `15')dnl define(`confAUTH_OPTIONS', `A')dnl TRUST_AUTH_MECH(`LOGIN PLAIN')dnl define(`confAUTH_MECHANISMS', `LOGIN PLAIN')dnl dnl DAEMON_OPTIONS(`Port=smtp,Addr=127.0.0.1, Name=MTA')dnl dnl FEATURE(`accept_unresolvable_domains')dnl /etc/dovecot.conf protocols = pop3 login = pop3 login_executable = /usr/libexec/dovecot/pop3-login pop3_executable = /usr/libexec/dovecot/pop3 Thank you in advance. Best Regards, Ciba LO<cibalo@xxxxxxxxx>