sicher mal deine config und versuch mal unter den Punkt SASL parameters nur das stehen zu lassen:
Code:
#
# SASL paramters;
#
smtpd_sasl_auth_enable       = yes
smtpd_sasl2_auth_enable      = yes
smtpd_sasl_security_options  = noanonymous
smtpd_sasl_local_domain      =
broken_sasl_auth_clients     = yes
smtpd_sender_restrictions    = permit_mynetworks,
                               permit_sasl_authenticated,
                               reject_unauth_destination
smtpd_recipient_restrictions = permit_mynetworks,
                               permit_sasl_authenticated,
                               reject_unauth_destination
                               check_policy_service inet:127.0.0.1:60000
 
danach neustart nicht vergessen