수고하십니다.

도메인 :dhcab.com 
메일을 gmail로 포워딩 받아서 쓰고 있었는데 메일 송수신이 안되네요...확인 좀 부탁드립니다.

-반송된 메일 정보-

The original message was received at Tue, 29 Nov 2022 19:45:54 +0900
from star.byus.net [61.111.254.203]

   ----- The following addresses had permanent fatal errors -----
<dhcab at dhcab.com>
    (reason: 550-5.7.25 [61.111.255.114] The IP address sending this message does not have a)

   ----- Transcript of session follows -----
... while talking to gmail-smtp-in.l.google.com.:
>>> DATA
<<< 550-5.7.25 [61.111.255.114] The IP address sending this message does not have a
<<< 550-5.7.25 PTR record setup, or the corresponding forward DNS entry does not
<<< 550-5.7.25 point to the sending IP. As a policy, Gmail does not accept messages
<<< 550-5.7.25 from IPs with missing PTR records. Please visit
<<< 550-5.7.25  https://support.google.com/mail/answer/81126#ip-practices for more
<<< 550 5.7.25 information. q12-20020a170902eb8c00b001891509807fsi4979031plg.575 - gsmtp
554 5.0.0 Service unavailable


Reporting-MTA: dns; nice.byus.net
Received-From-MTA: DNS; star.byus.net
Arrival-Date: Tue, 29 Nov 2022 19:45:54 +0900

Final-Recipient: RFC822; sharmcollection at
gmail.com
Action: failed
Status: 5.7.25
Remote-MTA: DNS; gmail-smtp-in.l.google.com
Diagnostic-Code: SMTP; 550-5.7.25 [61.111.255.114] The IP address sending this message does not 
have a
Last-Attempt-Date: Tue, 29 Nov 2022 19:45:56 +0900