SMTP problem

[Y2K.bug]

but i think, this will not be the probelm, because it writes on my second server too...

this is what I have found in var/log/mail.log

Oct 10 11:08:26 www postfix/smtpd[22582]: connect from ip-89-103-7-191.karneval.cz[89.103.7.191]
Oct 10 11:08:31 www postfix/smtpd[22582]: warning: SASL authentication failure: cannot connect to saslauthd server: No such file or directory
Oct 10 11:08:31 www postfix/smtpd[22582]: warning: SASL authentication failure: Password verification failed
Oct 10 11:08:31 www postfix/smtpd[22582]: warning: ip-89-103-7-191.karneval.cz[89.103.7.191]: SASL PLAIN authentication failed: generic failure
Oct 10 11:08:31 www postfix/smtpd[22582]: warning: SASL authentication failure: cannot connect to saslauthd server: No such file or directory
Oct 10 11:08:31 www postfix/smtpd[22582]: warning: ip-89-103-7-191.karneval.cz[89.103.7.191]: SASL LOGIN authentication failed: generic failure
Oct 10 11:08:32 www postfix/smtpd[22582]: disconnect from ip-89-103-7-191.karneval.cz[89.103.7.191]