因此,我嘗試為我的伺服器設定反向 dns,並將其正確地對應到我的郵件網域,並且我對 mail-test 進行了測試,但反向 dns 失敗:Spam Assasin RDNS_NONE
,但在郵件驗證上,下面顯示已通過rDns 正確身份驗證:IP: xx.xxx.xxx.xx HELO: mail.xxxxxx.com rDNS: mail.xxxxxx.com
我還對 MxToolBox 進行了電子郵件健康狀況測試,並收到此警告:Reverse DNS does not contain the hostname
,我使用dig -x xx.xxx.xxx.xx 檢查了反向查找,結果是這樣的,我得到2 個dns 結果答案部分但其中之一隻是郵件。另一個是完整的mail.xxxxxx.com,如何解決這個問題?它與我的問題有關嗎?
; <<>> DiG 9.11.3-1ubuntu1.13-Ubuntu <<>> -x xx.xxx.xxx.xx
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 9297
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 65494
;; QUESTION SECTION:
;xx.xxx.xxx.xx.in-addr.arpa. IN PTR
;; ANSWER SECTION:
xx.xxx.xxx.xx.in-addr.arpa. 0 IN PTR mail.xxxxx.com.
xx.xxx.xxx.xx.in-addr.arpa. 0 IN PTR mail. //Why both? and why this only is only the subdomain wihtout the full one?
;; Query time: 0 msec
;; SERVER: 127.0.0.53#53(127.0.0.53)
;; WHEN: Sat Dec 05 20:08:59 UTC 2020
;; MSG SIZE rcvd: 101