Hi, I'm new here ! I hope someone can help me to fix this issue with relay access denied. Postfix server ip is "10.40.10.31" and the default gateway is one of the public ip of our ISP, we are using this server to only send out weekly pricelist to customers and everything works fine from 10.40.10.0/23 subnet. Now I have added a new subnet 10.40.100.0/23 so the users can send out email from this subnet but we are getting 554 access denied error. I have added the new subnet "10.40.100.0" in "mynetworks". My postconf: [root@smtp-out]/root: postconf -n alias_maps = hash:/etc/aliases allow_percent_hack = no bounce_queue_lifetime = 1d command_directory = /usr/local/sbin config_directory = /usr/local/etc/postfix daemon_directory = /usr/local/libexec/postfix default_destination_concurrency_limit = 10 default_process_limit = 300 home_mailbox = Maildir/ local_transport = error:local mail delivery is disabled maximal_queue_lifetime = 1d mydomain = cdiemail.com myhostname = smtp-out.cdiemail.com mynetworks = 127.0.0.0, 10.40.10.0/23, 192.168.106.0/24, 10.40.100.0/24 myorigin = domainname.com qmgr_message_active_limit = 40000 qmgr_message_recipient_limit = 40000 queue_directory = /usr/postfix smtpd_helo_required = yes smtpd_recipient_restrictions = check_recipient_access hash:/usr/local/etc/postfix/recipients, reject_non_fqdn_sender, reject_non_fqdn_recipient, check_client_access hash:/usr/local/etc/postfix/mynetworks, reject_unauth_destination, permit_mynetworks, reject smtpd_restriction_classes = check_for_valid_sender smtpd_sender_restrictions = reject_non_fqdn_sender, reject_non_fqdn_recipient, permit transport_maps = hash:/usr/local/etc/postfix/transport unknown_address_reject_code = 553 unknown_client_reject_code = 554 unknown_hostname_reject_code = 554 [root@smtp-out]/root: Thanks, Mike
