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We trying to fix a problem with one of our servers. The message system of Directadmin can't send mails, we get the following error in the Exim mainlog: SMTP error from remote mail server after MAIL FROM:<username@hostname> SIZE=1751 AUTH=username@hostname: 451 unable to verify sender In the...

Hi everyone, After updating a lot of our servers don't have working proFTPd anymore. ProFTPd will start but would not bind to port 21: Jan 11 09:15:14 servername.name.nl systemd[1]: Stopped ProFTPD FTP Server. Jan 11 09:15:14 servername.name.nl systemd[1]: Starting ProFTPD FTP Server... Jan...