ubuntu 18.10 vsftpd 架設 - Linux

我遇到新的問題,
設定我就不刪除,
看下面的,

FTP, Mail, DNS, WWW, Samba, 都架好了,

其他都正常, 就其中 Mail server 問題比較大,
寄給 Gmail 寄不出去, 但可以收到 Gmail寄給我的信,

寄給 yahoo 就很正常, 收發信都 ok.

目前錯誤訊息如下,
(有爬過 google, 但看不太懂, 抱歉, 很久沒玩 linux, 已經退化成新手了 @@)
(不曉得要從哪邊下手, 從 google 那邊處理,
那以後寄給 google 的其他使用者那不就都要改一次,
還是要改我這邊 mail server 的設定.

google 查到如下,
https://productforums.google.com/forum/#!topic/gmail/el98PiSwc8U

覺得好複雜,
不曉得怎麼下手?

請各位不吝指教,
有需要我補齊相關設定檔或記錄的,
再跟我說我再 PO 上來.

感謝! m(_._)m
_________________________________________________

This is the mail system at host tw 網域

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

The mail system

<XXX @ 網域 (非 tw)>: host ASPMX.L.GOOGLE.com[74.125.204.27] said: 550-5.7.1
This message does not have authentication information or fails to pass
550-5.7.1 authentication checks. To best protect our users from spam, the
550-5.7.1 message has been blocked. Please visit 550-5.7.1
https://support.google.com/mail/answer/81126#authentication for more 550
5.7.1 information. y26si9578411pfd.25 - gsmtp (in reply to end of DATA
command)



Reporting-MTA: dns; XXX @ 網域 (tw)
X-Postfix-Queue-ID: 622C11580066
X-Postfix-Sender: rfc822; XXX @ 網域 (tw)
Arrival-Date: Mon, 10 Dec 2018 11:16:58 +0800 (CST)

Final-Recipient: rfc822; XXX @ 網域 (非 tw)
Original-Recipient: rfc822; XXX @ 網域 (非 tw)
Action: failed
Status: 5.7.1
Remote-MTA: dns; ASPMX.L.GOOGLE.com
Diagnostic-Code: smtp; 550-5.7.1 This message does not have authentication
information or fails to pass 550-5.7.1 authentication checks. To best
protect our users from spam, the 550-5.7.1 message has been blocked.
Please
visit 550-5.7.1
https://support.google.com/mail/answer/81126#authentication for more 550
5.7.1 information. y26si9578411pfd.25 - gsmtp


※ 引述《saveme (hihi不要在底下推噓文， )》之銘言：
: 標題: [問題] ubuntu 18.10 vsftpd 架設
: 時間: Wed Nov 28 10:14:08 2018
:
: 抱歉,問一下,
: 我電腦當 Server 用 ubuntu 18.10 版灌 vsftpd,
:
: Server 這台本機開網頁打 ftp://192.168.yy.xxx 連 ftp ok.
:
: 用另外一台電腦開網頁打 ftp://192.168.yy.xxx 連不上 ftp,
:
: 有點無助, 請幫忙我看一下,
: 我在我工作的電腦上網都正常,
: 架 Samba 也 ok, 都收得到.
: 但在用 ftp 時就 GG 了.
:
: 我把架構先補上,
: 後續還有相關訊息貼會貼上,
: 謝謝!
:
: 架構:
: mmm.uuu.lll.zzz
:
: 中華電信 modem
:
: ^
: |
:
: 192.168.yy.xxx 192.168.yy.zzz 192.168.yy.kkk
: <==> <==>
: Server RB750-GR3 我工作的電腦
:
:
: --