*****************************DESIGNED BY SMX******************************

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#1 Istanza di postfix, 2 Content filter                                  #
#                                                                        #     
#           ___________  port 10023   _________  port 10024   _________  #
#port 25   |           |------------>| content |------------>| content | #
#--------->|  postifx  |             | filter  |             | filter  | #
#          |___________|<-----|      |____1____|        |----|____2____| #
#                 |           |                         |                #
#                 |           |     port 10025          |                #
#                 |           |-------------------------|                #
#                 |                                                      #
#                 ---> delivery                                          #
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#2 Istanze di postfix, ad ognuna il suo Content filter                   #
#                                                                        #
#           ___________  port 10023   _________                          #  
#port 25   |    1st    |------------>| content |                         # 
#--------->|  postifx  |             | filter  |                         #
#          |__istance__|             |____1____|                         #
#                           port XX       |                              #
#                    ---------------------|                              #
#                    |                                                   #
#                    V                                                   #
#           ___________                                                  #   
#          |    2nd    | port 10024                                      # 
#          |  postifx  |-----------> _________                           #
#          |__istance__|<-          | content |                          #
#             |          |          | filter  |                          #   
#             |          |          |____2____|                          #
#             |          |   port 10025   |                              #
#             |          |----------------|                              #
#             |                                                          #
#             |->Delivery                                                #
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