osticket can not send mail issue

osticket 沒辦法寄信
/var/log/maillog 中顯示

Aug 11 14:41:36 osticketRD postfix/smtp[2616]: 27D5C140047D: to=, relay=smtp.XXX.com.tw[172.22.XXX.]:25, delay=0.38, delays=0.1/0.04/0.02/0.22, dsn=5.1.8, status=bounced (host smtp.XXX.com.tw[172.22.16.89] said: 553 5.1.8 ... Domain of sender address apache@osticketRD.localdomain does not exist (in reply to MAIL FROM command))

被mail server 拒絕, send from address 是localdomain

解決方式: 設定postfix /etc/postfix/main.cf

myhostname = osticketRD
mydomain = XXX.com.tw

執行:
# postfix reload

再試一次就能寄出了.