I get this error when I send to an announce list. The list contains only rhodewalt.com addresses (each in daily use), and I'm sending from the Dreamhost webmail interface.
I believe I need to set up an alias to point to the announce list, which I've tried, but I can't find the right settings. Thanks for any suggestions.
mx1.balanced.janky.mail.dreamhost.com[184.108.40.206] said: 550
firstname.lastname@example.org: Recipient address rejected: User unknown in virtual
alias table (in reply to RCPT TO command)