On 11/8/25 12:39, Ken G. wrote:

<[email protected]>: host
     mail.thedagora.social[172.238.182.104] said: 550 5.1.1
    <[email protected]>: Recipient address rejected: User
     unknown in virtual mailbox table (in reply to RCPT TO command)
...
virtual_mailbox_domains = mysql:/etc/postfix/mysql-virtual-mailbox-domains.cf
virtual_mailbox_maps = mysql:/etc/postfix/mysql-virtual-mailbox-maps.cf
virtual_transport = lmtp:unix:private/dovecot-lmtp


This is the problem. Your domain is a virtual_mailbox_domain. You need to configure an alias_domain for your list domain and configure Postfix per https://docs.mailman3.org/projects/mailman/en/latest/src/mailman/docs/mta.html#unusual-postfix-configuration

--
Mark Sapiro <[email protected]>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan

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