the following is my main.cf =================== relay_recipient_maps =hash:/etc/postfix/relay_recipients mime_header_checks = pcre:/etc/postfix/mime_header_checks disable_dns_lookups = no mailbox_command = mailbox_transport = strict_8bitmime = no disable_mime_output_conversion = no smtpd_sender_restrictions = hash:/etc/postfix/access smtpd_client_restrictions = smtpd_helo_required = yes disable_vrfy_command=yes smtpd_helo_restrictions = strict_rfc821_envelopes = no smtpd_recipient_restrictions = reject_non_fqdn_recipient reject_non_fqdn_sender reject_unknown_sender_domain reject_unknown_recipient_domain permit_mynetworks reject_unauth_destination check_recipient_access hash:/etc/postfix/roleaccount_exceptions reject_non_fqdn_hostname reject_invalid_hostname check_client_access cidr:/etc/postfix/spam_cidr check_helo_access pcre:/etc/postfix/helo_checks reject_rbl_client zen.spamhaus.org reject_rhsbl_sender dsn.rfc-ignorant.org permit
smtpd_data_restrictions = reject_multi_recipient_bounce reject_unauth_pipelining permit is there anything missed out in the above! appreciate ur advices thanks