Smtp notification error on software update

Hi everyone I noticed that the neth7 software update notices are no longer rotated to the administrator (root with alias (admin@neth7.internal2.lan)

SMTP error (550): Failed to insert recipient “root@internal2.lan” (5.1.1 root@internal2.lan: Recipient address rejected: User unknown in virtual mailbox table) Then it is rotated to the smart host, clearly with error outcome …
root@neh7.internal2.lan: host smtp-mail.outlook.com [52.97.168.194] said: 554
5.2.0

I solved it, by changing the myhostname server.ddns.net directive, to the real domain name server.internal2.lan. This ddns hostname was declared for tests done with mxtoolbox. Root notifications for system events have now started working again.

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