Hi, I set up mailman3 following the instruction on the mailman3 website. Everything went well until I got to the “Hooking up your mail server” at https://docs.mailman3.org/projects/mailman/en/latest/src/mailman/docs/mta.ht... . I followed the instructions, but when I try to send an email to one of the lists I created, I get the error below. I have postfix installed on the same server as mailman3. I was wondering if I missed something during the mail server set up process. Relevant parts of my config files are below. Error: Aug 19 15:06:10 xxx-rocky9 postfix/smtpd[153746]: NOQUEUE: reject: RCPT from xxxx.xxxxxx-xx.iphmx.com[xx.x.xx.xxx]: 550 5.1.1 <devops@xxx.xxx.edu>: Recipient address rejected: User unknown in local recipient table; from=<xxx@xxxx.edu> to=<xxx@xx.xx.edu> proto=ESMTP helo=<xx.xx-xx.iphmx.com>

mailman.cfg [mta] verp_confirmations: yes verp_personalized_deliveries: yes verp_delivery_interval: 1 incoming: mailman.mta.postfix.LMTP outgoing: mailman.mta.deliver.deliver lmtp_host: localhost lmtp_port: 8024 smtp_host: localhost smtp_port: 25 configuration: python:mailman.config.postfix recipient_delimiter = + unknown_local_recipient_reject_code = 550 owner_request_special = no

mailman/config/postfix.cfg [postfix] postmap_command: /usr/sbin/postmap transport_file_type: hash

main.cf smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination myhostname = xxx.xxx.edu alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases mydestination = $myhostname, mailman, localhost.localdomain, , localhost relayhost = [xx.xx.xx.xx] mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 recipient_delimiter = + inet_interfaces = all inet_protocols = all transport_maps = hash:/opt/mailman/mm/var/data/postfix_lmtp local_recipient_maps =$alias_maps hash:/opt/mailman/mm/var/data/postfix_lmtp relay_domains = hash:/opt/mailman/mm/var/data/postfix_domains

Thanks,

Eyoel Mengesha