公司伺服器中有客戶的網站，也有設定郵件伺服器 ! 但除了登入其中一個網域能使收發信件(ideatalalk)，其餘網域均只能發信卻無法收信

geasyweb@ideatalk:~$ dig -x 211.23.154.14

; <<>> DiG 9.9.5-4.3ubuntu0.3-Ubuntu <<>> -x 211.23.154.14
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 11376
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;14.154.23.211.in-addr.arpa. IN PTR

;; ANSWER SECTION:
14.154.23.211.in-addr.arpa. 43200 IN PTR 211-23-154-14.HINET-IP.hinet.net .

;; AUTHORITY SECTION:
154.23.211.in-addr.arpa. 86400 IN NS vns2.hinet.net.
154.23.211.in-addr.arpa. 86400 IN NS vns1.hinet.net.

;; Query time: 21 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Thu May 26 09:54:55 CST 2016
;; MSG SIZE rcvd: 139