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fail2ban – lost connection after auth from unknown

How to prevent the fail2ban logs: lost connection after auth from unknown Output of the fail2ban log file Jul 20 14:57:56 mattionline postfix/smtpd[997]: connect from unknown[103.238.231.244] Jul 20 14:57:56 mattionline postfix/smtpd[997]: lost connection after CONNECT from unknown[103.238.231.244] Jul 20 14:57:56 …

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