Relay access denied

[sered]

We can't send mail in gateway, this is the issue:

Apr 15 05:17:04 antispam postfix/smtpd[3598]: NOQUEUE: reject: RCPT from s7.xxx.net[x.x.x.xx]: 554 5.7.1 <contact@xxx.com>: Relay access denied; from=<felipe@xxx.net> to=<contact@xxx.com> proto=ESMTP helo=<s7.xxx.net>

Note: Proxmox Mail Gateway 4.0-4


How to fix this?

Thanks.

 

[tom]

either you are sending to the wrong port or you did not add the sender IP to the "Configuration/Mail Proxy/Networks: internal (trusted) IP Networks)"

of you just have no license for this domain.?