I am unable to login to my new mail server running Dovecot and Postfix for some reason. When I check the mail logs, I am seeing: Nov 11 16:06:29 mail dovecot: imap-login: Disconnected (no auth attempts): rip=10.1.10.204, lip=192.168.0.200, TLS handshaking: SSL_accept() failed: error:14094418:SSL routines:SSL3_READ_BYTES:tlsv1 alert unknown ca: SSL alert number 48 Nov 11 16:06:36 mail dovecot: auth: Error: pam(carlos,10.1.10.204): pam_authenticate() failed: Authentication failure (/etc/pam.d/dovecot missing?) Nov 11 16:06:53 mail dovecot: imap-login: Disconnected (auth failed, 3 attempts): user=<carlos>, method=PLAIN, rip=10.1.10.204, lip=192.168.0.200, TLS Nov 11 16:07:12 mail dovecot: imap-login: Disconnected (auth failed, 3 attempts): user=<carlos at iamghost.com>, method=PLAIN, rip=10.1.10.204, lip=192.168.0.200, TLS Below is my configuration file for Dovecot: # 2.0.7: /etc/dovecot/dovecot.conf # OS: Linux 2.6.35 x86_64 auth_mechanisms = plain login mail_location = maildir:~/mail passdb { driver = pam } protocols = imap service auth { unix_listener auth-client { group = postfix mode = 0660 user = postfix } user = root } ssl_cert = </etc/ssl/certs/mail.crt ssl_key = </etc/ssl/private/mail.key userdb { driver = passwd } protocol imap { imap_client_workarounds = delay-newmail tb-extra-mailbox-sep } Does anyone know what is causing this error or how I can resolve this?