I doubt many projects take the same disciplined (akin to micro-services) approach that postfix does:

     ... mail delivery is done by daemon processes that have no parental 
    relationship with user processes. This eliminates a large variety of 
    potential security exploits with environment variables, signal handlers, 
    and with other process attributes that UNIX passes on from parent to child.

 [edit] sorry for the spam, there was some problem with the submission form.