On Sat, 23 Jun 2018, Michael Parson wrote:
The first rule in my .procmailrc does this with
formail:
Anyone with any concept of security will not be running Procmail; it's not
even supported by its author any more, due to its opaque syntax and likely
vulnerabilities (it believes user-supplied headers and runs shell commands
based upon them).
-- Dave VK2KFU