Ok I think I may have muddled things up I have ispconfig installed, but something gave me the notion that the Mail service wouldn't work, so I also went through with this flurdy tutorial and set up my mail server as such: http://flurdy.com/docs/postfix/index.html So, courier is pointed to these mysql databases in order to search for these usernames. Everything is synchronized with that tutorial. But I am able to log in with my ISPconfig email addresses in outlook express, and emails aren't coming IN. When sending emails TO the ispconfig emails, I get the response "user unknown" Here's my Main.cf in postfix Code: myhostname = mail.mydomain.com alias_maps = hash:/etc/postfix/aliases alias_database = hash:/etc/postfix/aliases myorigin = /etc/mailname mydestination = relayhost = mynetworks = 127.0.0.0/8 mailbox_size_limit = 0 recipient_delimiter = + inet_interfaces = all mailbox_command = procmail -a "$EXTENSION" inet_protocols = all smtpd_sasl_local_domain = no smtpd_sasl_auth_enable = no smtpd_sasl_security_options = noanonymous broken_sasl_auth_clients = yes smtpd_recipient_restrictions = permit_sasl_authenticated,permit_mynetworks,reject_unauth_destination smtpd_tls_auth_only = no smtp_use_tls = yes smtp_tls_note_starttls_offer = yes smtpd_tls_CAfile = /etc/postfix/ssl/cacert.pem smtpd_tls_loglevel = 1 smtpd_tls_received_header = yes smtpd_tls_session_cache_timeout = 3600s tls_random_source = dev:/dev/urandom # modify the existing smtpd_recipient_restrictions smtpd_recipient_restrictions = reject_unauth_pipelining, permit_mynetworks, permit_sasl_authenticated, reject_non_fqdn_recipient, reject_unauth_destination, check_policy_service inet:127.0.0.1:60000, permit I'm sure my changes have messed up the incoming mail resolving. Is there a guide that I can follow to setup postfix/courier to read ispconfig's user emails and not look the ones I setup?