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Pitbull

postfix/smtpd warning ?

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Guten Abend zusammen !

 

Habe vermehrt diese Eintr?ge in der mail.log evtl. kann mir jemand ein Tipp geben gerade in Verbindung mit Fail2Ban.

Sep 16 20:31:13 sv01 postfix/smtpd[30331]: warning: valid_hostname: misplaced delimiter: .
Sep 16 20:31:13 sv01 postfix/smtpd[30331]: connect from unknown[31.210.124.242]
Sep 16 20:31:15 sv01 postfix/smtpd[30331]: warning: unknown[31.210.124.242]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
Sep 16 20:31:15 sv01 postfix/smtpd[30331]: disconnect from unknown[31.210.124.242]

LG

Pitbull

 

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Also wenn du nicht gerade Kunden in der T?rkei hast, dann w?rde ich sagen, dass da jemand versucht mit deinem Server zu verbinden um bspw. Spam zu versenden. Einfach mal testweise bspw. bei https://ipinfo.ioIP-Adressen eingeben und schauen wo die so herkommen.

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