Hi,
We have recently installed a proxmox mail server to act as a mail relay for some of our smaller clients, however mail from clients, to remove mail servers is being denied:
Dec 17 13:12:59 FCL-MS-01 postfix/smtpd[2894]: connect from unknown[124.150.174.17]
Dec 17 13:12:59 FCL-MS-01...
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