Override a transport configuration parameter with its own name

[msd+postfix-users]

Hi,

1. In master.cf, is it possible to override a transport configuration 
parameter with its own name ? Like this :

    transportname   unix  -       -       n       -       1       smtp
      -o transportname_destination_rate_delay=1s

If I can't, why ?

2. Can I use 'default_xxx' or 'smtp_xxx' ? Like this :

    transportname   unix  -       -       n       -       1       smtp
      -o default_destination_rate_delay=1s

Regards,


Msd