I can send and receive emails in aapanel just fine but if I set Mail forward, it does not work and gives following error in logs;
Jun 14 10:07:35 mail postfix/smtp[4040]: 254C11F4C6B: to=<testing@gmail.com>, orig_to=<adam@abc.com>, relay=gmail-smtp-in.l.google.com[142.251.10.26]:25, delay=5.1, delays=2.8/0.05/1.4/0.85, dsn=5.7.25, status=bounced (host gmail-smtp-in.l.google.com[142.251.10.26] said: 550-5.7.25 [108.61.169.10] 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. s7-20020a637707000000b0054403507e7esi10647613pgc.180 - gsmtp (in reply to end of DATA command))
Jun 14 10:07:35 mail postfix/cleanup[3935]: 3342C1F4C7D: message-id=<20230614100735.3342C1F4C7D@mail.abc.com>
Jun 14 10:07:35 mail postfix/qmgr[8594]: 3342C1F4C7D: from=<>, size=6992, nrcpt=1 (queue active)
Jun 14 10:07:35 mail postfix/bounce[4042]: 254C11F4C6B: sender non-delivery notification: 3342C1F4C7D
Jun 14 10:07:35 mail postfix/qmgr[8594]: 254C11F4C6B: removed
Jun 14 10:07:35 mail postfix/smtp[4040]: connect to gmail-smtp-in.l.google.com[2404:6800:4003:c0f::1a]:25: Network is unreachable
Jun 14 10:07:37 mail postfix/smtp[4040]: 3342C1F4C7D: to=<test2@gmail.com>, relay=gmail-smtp-in.l.google.com[142.251.10.26]:25, delay=2.5, delays=0/0/1.4/1.1, dsn=5.7.25, status=bounced (host gmail-smtp-in.l.google.com[142.251.10.26] said: 550-5.7.25 [108.61.169.10] 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. z6-20020aa79e46000000b0065df7ca02ffsi10604293pfq.42 - gsmtp (in reply to end of DATA command))
Jun 14 10:07:37 mail postfix/qmgr[8594]: 3342C1F4C7D: removed
All the MX/SPF/DKIM records for my domain is OK.
aapanel is hosted on Vultr VPS.
aaPanel_Kern Help please.