Client host rejected

[lmva]

Hi

i,ve installed Zimbra NE 7.1.2

setup up certificates and restricted SMTP to

smtpd_client_restrictions = reject_unauth_pipelining,permit_sasl_authenticated ,reject

i can send messages throught a normal email client but

Zimbra HTTP client and Outlook with ZCO can't

==> /var/log/zimbra.log <==
Sep 8 17:04:00 webmail3 postfix/smtpd[10095]: connect from webmail3.myitdepartment.ie[10.1.1.124]
Sep 8 17:04:00 webmail3 postfix/smtpd[10095]: NOQUEUE: reject: RCPT from webmail3.myitdepartment.ie[10.1.1.124]: 554 5.7.1 <webmail3.myitdepartment.ie[10.1.1.124]>: Client host rejected: Access denied; from=<info@seamusquinn.ie> to=<info@seamusquinn.ie> proto=ESMTP helo=<webmail3.myitdepartment.ie>
Sep 8 17:04:00 webmail3 postfix/smtpd[10095]: disconnect from webmail3.myitdepartment.ie[10.1.1.124]

how can i get them to send messages?