Noel, here is the output from postconf -n (sanitized). Thank you.
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
body_checks = regexp:/etc/postfix/body_checks
body_checks_size_limit = 51200
command_directory = /usr/sbin
compatibility_level = 2
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
debug_peer_level = 2
debugger_command = PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin xxgdb
$daemon_directory/$process_name $process_id & sleep 5
disable_vrfy_command = yes
header_checks = regexp:/etc/postfix/header_checks
html_directory = no
inet_interfaces = all
inet_protocols = ipv4
mail_owner = postfix
mailbox_size_limit = 100960000
mailbox_transport = lmtp:unix:/var/lib/imap/socket/lmtp
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
message_size_limit = 100960000
meta_directory = /etc/postfix
milter_default_action = reject
milter_header_checks =
milter_protocol = 6
mime_header_checks = $header_checks
mydestination = $myhostname, localhost.$mydomain, localhost, mydomain.com,
mail.mydomain.com
mynetworks = 140.247.197.121, 127.0.0.0/8, 192.168.0.0/16
mynetworks_style = host
nested_header_checks = $header_checks
newaliases_path = /usr/bin/newaliases.postfix
postscreen_greet_action = enforce
postscreen_greet_wait = ${stress?{2}:{11}}s
queue_directory = /var/spool/postfix
readme_directory = no
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
shlib_directory = no
smtp_body_checks =
smtp_header_checks =
smtp_mime_header_checks =
smtp_nested_header_checks =
smtp_tls_loglevel = 1
smtp_tls_session_cache_database = btree:/var/lib/postfix/smtp_tls_session_cache
smtpd_banner = ESMTP
smtpd_client_connection_count_limit = 10
smtpd_client_connection_rate_limit = 5
smtpd_client_event_limit_exceptions = $mynetworks
smtpd_client_new_tls_session_rate_limit = 4
smtpd_client_restrictions = permit_mynetworks, sleep 1, reject_unauth_pipelining
smtpd_discard_ehlo_keywords = silent-discard, dsn
smtpd_error_sleep_time = 1s
smtpd_hard_error_limit = 20
smtpd_helo_required = yes
smtpd_milters = unix:/var/run/spamass-milter/spamass-milter.sock
smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated,
check_client_access hash:/etc/postfix/rbl_override, reject_unauth_destination,
reject_non_fqdn_sender, reject_non_fqdn_recipient,
reject_unknown_sender_domain, reject_unknown_recipient_domain,
reject_unauth_pipelining, permit_mynetworks, reject_unauth_destination,
reject_rbl_client bl.spamcop.net, reject_rbl_client zen.spamhaus.org,
reject_rbl_client dyna.spamrats.com, reject_rbl_client list.dnsbl.org,
reject_rbl_client dnsbl.sorbs.net, reject_rbl_client ix.dnsbl.manitu.net, permit
smtpd_relay_restrictions = permit_mynetworks, permit_sasl_authenticated,
permit_tls_clientcerts, reject_unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain = mydomain.com
smtpd_sasl_path = smtpd
smtpd_sasl_security_options = noanonymous
smtpd_sender_restrictions = reject_unknown_address
smtpd_soft_error_limit = 10
smtpd_tls_CAfile = /etc/postfix/certs/cacert.pem
smtpd_tls_ask_ccert = yes
smtpd_tls_auth_only = yes
smtpd_tls_cert_file = /etc/postfix/certs/mail.mydomain.com.pem
smtpd_tls_key_file = /etc/postfix/certs/mail.mydomain.com.key
smtpd_tls_received_header = yes
smtpd_tls_security_level = may
smtpd_use_tls = yes
smtputf8_enable = no
tls_random_source = dev:/dev/urandom
unknown_local_recipient_reject_code = 550
