Just change my postfix from pam to mysql however after setup it shows while send out mail. 3 days i can't find out why postfix/smtpd[26315]: fatal: no SASL authentication mechanisms ++++++++++++++++++++++++++++++++++++++++ postconf alias_database = hash:/etc/aliases alias_maps = hash:/etc/aliases allow_percent_hack = no broken_sasl_auth_clients = yes command_directory = /usr/sbin config_directory = /etc/postfix daemon_directory = /usr/libexec/postfix data_directory = /var/lib/postfix debug_peer_level = 2 home_mailbox = Maildir/ html_directory = no inet_protocols = all mailbox_command = /usr/bin/procmail-wrapper -o -a $DOMAIN -d $LOGNAME mailbox_size_limit = 0 mailq_path = /usr/bin/mailq.postfix manpage_directory = /usr/share/man milter_default_action = accept milter_protocol = 2 mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain mydomain = domain.com myhostname = $mydomain myorigin = $mydomain newaliases_path = /usr/bin/newaliases.postfix non_smtpd_milters = $smtpd_milters readme_directory = /usr/share/doc/postfix-2.6.6/README_FILES sample_directory = /usr/share/doc/postfix-2.6.6/samples sender_bcc_maps = hash:/etc/postfix/bcc sendmail_path = /usr/sbin/sendmail.postfix setgid_group = postdrop smtp_sasl_auth_enable = yes smtp_sasl_password_maps = mysql:/etc/postfix/mysql_virtual_mailbox_maps.cf smtp_sasl_security_options = smtp_tls_CAfile = /etc/ssl/certs/ca-bundle.crt smtp_use_tls = yes smtpd_banner = $myhostname ESMTP $mail_name smtpd_milters = inet:127.0.0.1:8891 smtpd_recipient_restrictions = permit_mynetworks permit_sasl_authenticated reject_unauth_destination reject_sender_login_mismatch smtpd_sasl_auth_enable = yes smtpd_tls_cert_file = /etc/postfix/postfix.cert.pem smtpd_tls_key_file = /etc/postfix/postfix.key.pem smtpd_tls_mandatory_ciphers = high smtpd_tls_security_level = may transport_maps = hash:/etc/postfix/transport unknown_local_recipient_reject_code = 550 virtual_alias_domains = domain.com virtual_alias_maps = mysql:/etc/postfix/mysql_virtual_alias_maps.cf virtual_gid_maps = static:5000 virtual_mailbox_base = /home/vmail virtual_mailbox_domains = mysql:/etc/postfix/mysql_virtual_domains_maps.cf virtual_mailbox_limit = 51200000 virtual_mailbox_maps = mysql:/etc/postfix/mysql_virtual_mailbox_maps.cf virtual_minimum_uid = 5000 virtual_transport = dovecot virtual_uid_maps = static:5000