My newly installed email gateway is unable to send emails externally,

[271995796]

This is a log
Mar 05 08:34:15 pmg postfix/smtpd[225455]: using backwards-compatible default setting smtpd_relay_before_recipient_restrictions=no to reject recipient "271995796@qq.com" from client "ex19edge.domain.net[172.20.10.231]"
Mar 05 08:34:15 pmg postfix/smtpd[225455]: disconnect from ex19edge.domain.net[172.20.10.231] ehlo=1 mail=1 rcpt=0/1 quit=1 commands=3/4

 

[Chris]

Hi,
is there more in the logs, telling why the recipient was rejected?
As the log message states, your smtpd checked the recipient restrictions before possible relay restrictions (which is the default for backwards compatibility) [0]. Check your recipient restrictions [1], you most likely do not allow to send mail for this domain or user.

[0] http://www.postfix.org/COMPATIBILITY_README.html#relay_before_rcpt
[1] http://www.postfix.org/postconf.5.html#smtpd_recipient_restrictions

 

[271995796]

How to configure the Proxmox email gateway to allow my internal server to send emails externally through the Proxmox email gateway

 

[271995796]

May I ask how to change the port for accessing the graphical interface address of Proxmox Mail Gateway Web? I would like to change 8006 to 80 or 443

 

[DonnyJMiller]

I had a similar problem and it turned out my IP was on a domain blacklist. I ran a check on mxtoolbox and found the listing there. After requesting delisting and making sure my SPF, DKIM, and reverse DNS were set up right, things started working. Also, double check that your outgoing port 25 isn't being blocked by your ISP—it got me once.