Hello, I have Cyrus Murder 2.3.12p2 up and running (1 frontend, 1 backend, 1 mupdate), however when I enable virtdomains I receive the following error on the frontend: imapd/lmtp[]: verify_user (frontend.example.com!user.steve) failed: Mailbox does not exist Everything else seems to work fine (IMAP, POP, creating/deleting mailboxes with domain administrators), but the frontend server fails with the above message when receiving the email addressed to steve@xxxxxxxxxxx from Postfix (separate machine). Postfix returns: <steve@xxxxxxxxxxxxxxxxxxxx>: host xxx.xx.xx.xxx[xxx.xx.xx.xxx] said: 550-Mailbox unknown. Either there is no mailbox associated with this 550-name or you do not have authorization to see it. 550 5.1.1 User unknown (in reply to RCPT TO command) I've tried recreating the mailbox after virtdomains was enabled, but with the same result. Am I missing something in my Cyrus configuration, or is this an issue with Postfix? Thanks in advance, Dan Backend config: # /etc/imapd.conf configdirectory: /var/cyrus/imap partition-default: /var/cyrus/mail syslog_prefix: imapd admins: cyrus murd admin@xxxxxxx proxyservers: murd # settings for the mupdate (master) server mupdate_config: standard mupdate_username: back mupdate_authname: back mupdate_password: back mupdate_server: xxx.xxx.xxx.xxx mupdate_port: 3905 # allow user moves and renames allowusermoves: 1 # virtual domain # allowed values: off, userid, on virtdomains: userid defaultdomain: example.com servername: backend guid_mode: sha1 # Sieve sievedir: /var/cyrus/sieve sendmail: /usr/sbin/sendmail # Databases hashimapspool: true annotation_db: skiplist duplicate_db: skiplist mboxlist_db: skiplist quota_db: quotalegacy seenstate_db: skiplist subscription_db: skiplist # Authentication allowanonymouslogin: no allowplaintext: yes # Use saslauthd to authenticate users sasl_mech_list: plain sasl_pwcheck_method: saslauthd # Bounce messages that are over quota lmtp_over_quota_perm_failure: yes # tls/ssl support tls_cert_file: /var/cyrus/imap/tls/server.pem tls_key_file: /var/cyrus/imap/tls/server.pem tls_ca_file: /var/cyrus/imap/tls/server.pem Frontend config is similar, but with proxy_authname and backend_password ---- Cyrus Home Page: http://cyrusimap.web.cmu.edu/ Cyrus Wiki/FAQ: http://cyrusimap.web.cmu.edu/twiki List Archives/Info: http://asg.web.cmu.edu/cyrus/mailing-list.html