Where can I find some documentation on the syntax of ${run ...}?
I can't find it in the exim spec.
Then again, maybe there's a better way to do this.
I am trying to include the contents of a file in a header so I've been
trying:
headers_add = "My-Header: ${run {/bin/cat /my/file}{$value}{error}}"
All I get is is either 'error' or a blank, depending on how I configure it.
What's the best way to include a message from a file in the headers?
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