Postfix and Dictionary Attack Banning

I am watching the stinking spammer run his puny dictionary attack on one of our hosted main sites slowly whole day. There is an option for the non-existent account attempts to delay the delivery after xx seconds, and it works. In the whole day, he managed to try maybe 8-10 names from his dictionary.

However... is there a possibility or an add-on to ban the IP attempting such actions after X attempts for X seconds/minutes?


Thanks,

Postfix and Dictionary Attack Banning

 

 

 

 

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