On my Postfix server, I am unable to enable smtpd_*_restrictions in my
main.cf. With the following commented out, I can send and receive
email all day long with no problems but when I uncomment the following
lines, I get errors trying to send email from my email server...
#smtpd_recipient_restrictions =
# reject_invalid_hostname,
# reject_unknown_recipient_domain,
# reject_unauth_destination,
# reject_rbl_client sbl.spamhaus.org,
# permit
#smtpd_helo_restrictions =
# reject_invalid_helo_hostname,
# reject_non_fqdn_helo_hostname,
# reject_unknown_helo_hostname
And when I un-comment the above in main.cf, I get the following in my logs:
Sep 3 13:49:29 email postfix/smtpd[2522]: fatal: parameter
"smtpd_recipient_restrictions": specify at least one working instance
of: check_relay_domains, reject_unauth_destination, reject, defer or
defer_if_permit
Below is my "postconf -n" output:
email:~# postconf -n
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
config_directory = /etc/postfix
home_mailbox = mail/
inet_interfaces = all
mailbox_size_limit = 0
mydestination = $myhostname, $mydomain, localhost.$mydomain, localhost
myhostname = email.example.net
mynetworks = 10.1.0.0/16, 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
myorigin = example.net
readme_directory = no
recipient_delimiter = +
relayhost =
smtp_tls_session_cache_database = btree:${queue_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key
smtpd_tls_session_cache_database = btree:${queue_directory}/smtpd_scache
smtpd_use_tls = yes
