CentOS 6.4 x64 iRedMail SMTP Error: (451): Failed to add recipient

been managing my own servers for a bit now, but new to mailservers in general. I have gotten iRedMail installed on my box (CentOS 6.4 x64), but I'm getting an error when it comes to actually sending or receiving mail.

Error logs are below. I'm not really sure what is going on as I haven't dealt with Mail Servers much.

Looks to me that postfix is having trouble connecting to the hostname, but im not sure why.

Any ideas?

Nov  9 20:56:36 89ninetymailserver postfix/postfix-script[1130]: starting the Postfix mail system
Nov  9 20:56:36 89ninetymailserver postfix/master[1131]: daemon started -- version 2.6.6, configuration /etc/postfix
Nov  9 21:03:32 89ninetymailserver postfix/postfix-script[2112]: stopping the Postfix mail system
Nov  9 21:03:32 89ninetymailserver postfix/master[1131]: terminating on signal 15
Nov  9 21:03:33 89ninetymailserver postfix/postfix-script[2184]: starting the Postfix mail system
Nov  9 21:03:33 89ninetymailserver postfix/master[2185]: daemon started -- version 2.6.6, configuration /etc/postfix
Nov  9 21:16:00 89ninetymailserver postfix/smtpd[3636]: connect from localhost[127.0.0.1]
Nov  9 21:16:00 89ninetymailserver postfix/smtpd[3636]: warning: connect to 127.0.0.1:7777: Connection refused
Nov  9 21:16:00 89ninetymailserver postfix/smtpd[3636]: warning: problem talking to server 127.0.0.1:7777: Connection refused
Nov  9 21:16:01 89ninetymailserver postfix/smtpd[3636]: warning: connect to 127.0.0.1:7777: Connection refused
Nov  9 21:16:01 89ninetymailserver postfix/smtpd[3636]: warning: problem talking to server 127.0.0.1:7777: Connection refused
Nov  9 21:16:01 89ninetymailserver postfix/smtpd[3636]: NOQUEUE: reject: RCPT from localhost[127.0.0.1]: 451 4.3.5 Server configuration problem; from=<michael@agency89ninety.com> to=<mikethelegacy@gmail.com> proto=ESMTP helo=<89ninetymailserver.com>
Nov  9 21:16:01 89ninetymailserver roundcube: SMTP Error: SMTP error: Failed to add recipient 'mikethelegacy@gmail.com' in /var/www/roundcubemail-0.9.2/program/include/rcmail.php on line 1014 (POST /mail/?_unlock=loading1384031779756&_lang=undefined?_task=mail&_action=send)
Nov  9 21:16:01 89ninetymailserver postfix/smtpd[3636]: disconnect from localhost[127.0.0.1]
Nov  9 21:16:02 89ninetymailserver postfix/pickup[2187]: E2362C10DD: uid=0 from=<root>
Nov  9 21:16:02 89ninetymailserver postfix/cleanup[3699]: E2362C10DD: message-id=<20131109211602.E2362C10DD@89ninetymailserver.com>
Nov  9 21:16:02 89ninetymailserver postfix/qmgr[2188]: E2362C10DD: from=<usr@89ninetymailserver.com>, size=2240, nrcpt=1 (queue active)
Nov  9 21:16:02 89ninetymailserver postfix/trivial-rewrite[3639]: warning: do not list domain 89ninetymailserver.com in BOTH mydestination and virtual_mailbox_domains
Nov  9 21:16:02 89ninetymailserver postfix/qmgr[2188]: warning: connect to transport private/dovecot: No such file or directory
Nov  9 21:16:02 89ninetymailserver postfix/error[3712]: E2362C10DD: to=<usr@89ninetymailserver.com>, relay=none, delay=0.23, delays=0.19/0.02/0/0.03, dsn=4.3.0, status=deferred (mail transport unavailable)
Nov  9 21:16:12 89ninetymailserver postfix/smtpd[3636]: connect from localhost[127.0.0.1]
Nov  9 21:16:12 89ninetymailserver postfix/smtpd[3636]: warning: connect to 127.0.0.1:7777: Connection refused
Nov  9 21:16:12 89ninetymailserver postfix/smtpd[3636]: warning: problem talking to server 127.0.0.1:7777: Connection refused
Nov  9 21:16:13 89ninetymailserver postfix/smtpd[3636]: warning: connect to 127.0.0.1:7777: Connection refused
Nov  9 21:16:13 89ninetymailserver postfix/smtpd[3636]: warning: problem talking to server 127.0.0.1:7777: Connection refused
Nov  9 21:16:13 89ninetymailserver postfix/smtpd[3636]: NOQUEUE: reject: RCPT from localhost[127.0.0.1]: 451 4.3.5 Server configuration problem; from=<michael@agency89ninety.com> to=<mikethelegacy@gmail.com> proto=ESMTP helo=<89ninetymailserver.com>
Nov  9 21:16:13 89ninetymailserver roundcube: SMTP Error: SMTP error: Failed to add recipient 'mikethelegacy@gmail.com' in /var/www/roundcubemail-0.9.2/program/include/rcmail.php on line 1014 (POST /mail/?_unlock=loading1384031791814&_lang=undefined?_task=mail&_action=send)
Nov  9 21:16:13 89ninetymailserver postfix/smtpd[3636]: disconnect from localhost[127.0.0.1]
Nov  9 21:17:52 89ninetymailserver postfix/smtpd[3636]: connect from localhost[127.0.0.1]
Nov  9 21:17:52 89ninetymailserver postfix/trivial-rewrite[15673]: warning: do not list domain 89ninetymailserver.com in BOTH mydestination and virtual_mailbox_domains
Nov  9 21:17:52 89ninetymailserver postfix/smtpd[3636]: warning: connect to 127.0.0.1:7777: Connection refused
Nov  9 21:17:52 89ninetymailserver postfix/smtpd[3636]: warning: problem talking to server 127.0.0.1:7777: Connection refused
Nov  9 21:17:53 89ninetymailserver postfix/smtpd[3636]: warning: connect to 127.0.0.1:7777: Connection refused
Nov  9 21:17:53 89ninetymailserver postfix/smtpd[3636]: warning: problem talking to server 127.0.0.1:7777: Connection refused
Nov  9 21:17:53 89ninetymailserver postfix/smtpd[3636]: NOQUEUE: reject: RCPT from localhost[127.0.0.1]: 451 4.3.5 Server configuration problem; from=<postmaster@89ninetymailserver.com> to=<mikethelegacy@gmail.com> proto=ESMTP helo=<89ninetymailserver.com>
Nov  9 21:17:53 89ninetymailserver roundcube: SMTP Error: SMTP error: Failed to add recipient 'mikethelegacy@gmail.com' in /var/www/roundcubemail-0.9.2/program/include/rcmail.php on line 1014 (POST /mail/?_unlock=loading1384031891857&_lang=undefined?_task=mail&_action=send)
Nov  9 21:17:53 89ninetymailserver postfix/smtpd[3636]: disconnect from localhost[127.0.0.1]
Nov  9 21:19:32 89ninetymailserver postfix/smtpd[3636]: connect from localhost[127.0.0.1]
Nov  9 21:19:32 89ninetymailserver postfix/smtpd[3636]: warning: connect to 127.0.0.1:7777: Connection refused
Nov  9 21:19:32 89ninetymailserver postfix/smtpd[3636]: warning: problem talking to server 127.0.0.1:7777: Connection refused
Nov  9 21:19:33 89ninetymailserver postfix/smtpd[3636]: warning: connect to 127.0.0.1:7777: Connection refused
Nov  9 21:19:33 89ninetymailserver postfix/smtpd[3636]: warning: problem talking to server 127.0.0.1:7777: Connection refused
Nov  9 21:19:33 89ninetymailserver postfix/smtpd[3636]: NOQUEUE: reject: RCPT from localhost[127.0.0.1]: 451 4.3.5 Server configuration problem; from=<postmaster@89ninetymailserver.com> to=<mike@legacycreativestudio.com> proto=ESMTP helo=<89ninetymailserver.com>
Nov  9 21:19:33 89ninetymailserver roundcube: SMTP Error: SMTP error: Failed to add recipient 'mike@legacycreativestudio.com' in /var/www/roundcubemail-0.9.2/program/include/rcmail.php on line 1014 (POST /mail/?_unlock=loading1384031991598&_lang=undefined?_task=mail&_action=send)
Nov  9 21:19:33 89ninetymailserver postfix/smtpd[3636]: disconnect from localhost[127.0.0.1]
Nov  9 21:23:33 89ninetymailserver postfix/qmgr[2188]: E2362C10DD: from=<usr@89ninetymailserver.com>, size=2240, nrcpt=1 (queue active)
Nov  9 21:23:33 89ninetymailserver postfix/trivial-rewrite[15707]: warning: do not list domain 89ninetymailserver.com in BOTH mydestination and virtual_mailbox_domains
Nov  9 21:23:33 89ninetymailserver postfix/qmgr[2188]: warning: connect to transport private/dovecot: No such file or directory
Nov  9 21:23:33 89ninetymailserver postfix/error[15709]: E2362C10DD: to=<usr@89ninetymailserver.com>, relay=none, delay=451, delays=451/0.04/0/0.01, dsn=4.3.0, status=deferred (mail transport unavailable)