relay access denied

[ivanzhang]

Hello,

I tried to send email A.cc to B.com come from internet,but when I send an email transaction I get a problem with the error message 'relay access denied'
Please advise.

3.017091+08:00 postfix/smtpd[9851]: connect from unknown[120.xxx.xxx.xxx]
2023-12-28T20:41:13.203943+08:00 A postfix/smtpd[9851]: NOQUEUE: reject: RCPT from unknown[120.xxx.xxx.xxx]: 554 5.7.1 <XXX@B.COM>: Relay access denied; from=<xxx@A.cc> to=<XXX@B.COM> proto=ESMTP helo=<[M11K2C.lan]>
2023-12-28T20:41:13.204128+08:00 A postfix/smtpd[9851]: using backwards-compatible default setting smtpd_relay_before_recipient_restrictions=no to reject recipient "XXX@B.COM" from client "unknown[120.xxx.xxx.xxx]"
2023-12-28T20:41:13.224360+08:00 A postfix/smtpd[9851]: lost connection after RCPT from unknown[120.xxx.xxx.xxx]
2023-12-28T20:41:13.224484+08:00 A postfix/smtpd[9851]: disconnect from unknown[120.xxx.xxx.xxx] ehlo=1 mail=1 rcpt=0/1 commands=2/3

 

[sb-jw]

Please do not post your problem multiple times here in the forum:
https://forum.proxmox.com/threads/installed-pmg.139241/
https://forum.proxmox.com/threads/relay-access-denied.139065/
https://forum.proxmox.com/threads/mail-gateway-installation-question.139250/