How to configure Fail2ban to blacklist an attack with postfix/smtpd (I am a novice)

bantime.increment = true

default factor (causes increment - 1h → 1d 2d 4d 8d 16d 32d …):

bantime.factor = 2

max banning time = 5 week:

bantime.maxtime = 5w

these 3 entries looks intresting , i need to try this once, to ban the IP address resurrections

which is obviously a Blacklisted IP address.

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