main.cf and main.cf.backups diferencias

# delay_warning_time = 4h
# smtp-filter_destination_currency_limit = 2
# lmtp-filter_destination_currency_limit = 2

#
# SASL Support
#
smtpd_sasl_path = /etc/postfix/sasl:/usr/lib64/sasl2

#
# TLS Support
#
smtpd_helo_required = yes
strict_rfc821_envelopes = yes

#
# Restricciones para usuarios y dominios
#
# smtpd_client_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unknown_client
# smtpd_helo_restrictions = reject_invalid_hostname, reject_unknown_hostname, reject_non_fqdn_hostname
# smtpd_sender_restrictions = check_sender_access hash:/etc/postfix/lista_blanca
smtpd_recipient_restrictions = reject_invalid_hostname, reject_non_fqdn_hostname, reject_non_fqnd_sender, reject_unknown_sender_domain, reject_unknown_recipient_domain, permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination, reject_rbl_client cbl.abuseat.org