sendmail(1) on macOS
The text 40cdd9accdb7, as Mac OS X 10.7.5, Mac OS X 10.7.4, Mac OS X 10.7.3, Mac OS X 10.7.2, Mac OS X 10.7.1, Mac OS X 10.7 shipped it.
Postfix to Sendmail compatibility interface
Flags it lists
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