I have installed ISPConfig 3 on CentOS 5.5. I have all the services running fine with Dovecot as IMAP server. I am getting below error in maillog. fatal: no SASL authentication mechanisms I have used dovecot-2.0-0.18_114_rc3.el5.x86_64.rpm dovecot-sieve-0.1.17-5.el5.x86_64.rpm I am not able to login the squirrelmail. It gives error as "Unknown user or password incorrect".. Please can someone advice me.