OK list, finally I have solved it. in /etc/imapd.cong I have modified allowplaintext: yes sasl_minimum_layer: 0 sasl_mech_list: LOGIN PLAIN and now sieve is working well. but I like to know how [allowplaintext: yes] can effect my security than [allowplaintext: no] ? thanks ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html