Back-Off, or something of which nothing is written

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Content preview:  As i understand the whole process of back-off, just by observing
   what is happening with my node: There are two numbers, the first is how much
   time is left for the node to be backed off. The second is how much time it
   was backed-off for during this incident. When the first counter reaches 0,
   then it checks whether it can do things correctly now. If not, it then increases
   the second number (doubles it?) and then sets the first to that value and
   waits again. If it can communicate, then it decreases the second number and
   things operate normally. [...] 

Content analysis details:   (5.2 points, 5.0 required)

 pts rule name              description
---- ---------------------- --------------------------------------------------
 2.0 FREENET_FROM_BACKUPMX  Received from the backup-MX server
 0.8 BAYES_50               BODY: Bayes spam probability is 40 to 60%
                            [score: 0.5000]
 0.1 DKIM_SIGNED            Message has a DKIM or DK signature, not necessarily valid
 1.0 T_DKIM_INVALID         DKIM-Signature header exists but is not valid
 0.5 UNPARSEABLE_RELAY      Informational: message has unparseable relay lines
 0.8 RDNS_NONE              Delivered to internal network by a host with no rDNS

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