O I think I get it. I could use the ${sender} variable in the script and it would already be defined. Ill have to test that when I get home.
I mostly just meant is it necessary? What would happen if I didnt include these 3 macros? Why just these specific 3?
I am trying to run a script when postfix receives an email and have found an example that I mostly understand. my_shell_script unix - n n - -...
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