Ansgar Wiechers Thanks.
I have gone through this and also looking at the dovecot.conf file. I am seeing references to mysql. I am now concerned that by making changes to the conf file I will mess up my mysql configuration. Main.cf # See /usr/share/postfix/main.cf.dist for a commented, more complete version # Debian specific: Specifying a file name will cause the first # line of that file to be used as the name. The Debian default # is /etc/mailname. #myorigin = /etc/mailname smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU) biff = no # appending .domain is the MUA's job. append_dot_mydomain = no # Uncomment the next line to generate "delayed mail" warnings #delay_warning_time = 4h readme_directory = no # TLS parameters smtpd_tls_cert_file = /etc/ssl/certs/dovecot.pem smtpd_tls_key_file = /etc/ssl/private/dovecot.pem smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache # See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for # information on enabling SSL in the smtp client. myhostname = mail.biggdog.biz alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases myorigin = biggdog.biz mydestination = relayhost = mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 mailbox_command = procmail -a "$EXTENSION" mailbox_size_limit = 0 recipient_delimiter = + inet_interfaces = all smtpd_tls_CAfile = /etc/ssl/certs/cacert.biggdog.biz.pem smtpd_tls_received_header = yes mydomain = biggdog.biz virtual_minimum_uid = 6060 virtual_gid_maps = static:6060 virtual_uid_maps = static:6060 virtual_alias_maps = proxy:mysql:/etc/postfix/mysql_virtual_alias_maps.cf, hash:/etc/postfix/virtual virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysql_virtual_domains_maps.cf virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql_virtual_mailbox_maps.cf virtual_transport = dovecot virtual_mailbox_base = /var/vmail/ dovecot_destination_concurrency_limit = 2 dovecot_destination_recipient_limit = 1 smtpd_sasl_type = dovecot smtpd_sasl_path = private/auth broken_sasl_auth_clients = yes smtpd_sasl_auth_enable = yes smtpd_sasl_local_domain = $myhostname smtpd_sasl_security_options = noanonymous smtpd_sasl_authenticated_header = yes smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination, reject_unlisted_recipient, check_recipient_access hash:/etc/postfix/reject_over_quota, check_sender_access hash:/etc/postfix/rbl_sender_exceptions, check_client_access hash:/etc/postfix/rbl_client_exceptions, check_recipient_access hash:/etc/postfix/rbl_recipient_exceptions, reject_rbl_client sbl-xbl.spamhaus.org smtpd_hard_error_limit = 10 smtpd_soft_error_limit = 8 smtpd_helo_required = yes smtpd_sender_restrictions = check_sender_access hash:/etc/postfix/sender_access, reject_non_fqdn_sender, reject_unknown_sender_domain smtpd_data_restrictions = reject_unauth_pipelining local_transport = error:no local mail delivery proxy_interfaces = 68.55.47.24 message_size_limit = 51200000 transport_maps = hash:/etc/postfix/transport vacation_destination_recipient_limit = 1