smtpd(8) on OpenBSD
The text fe26b4140971, as OpenBSD 7.2, OpenBSD 7.1, OpenBSD 7.0, OpenBSD 6.9, OpenBSD 6.8, OpenBSD 6.7, OpenBSD 6.6, OpenBSD 6.5, OpenBSD 6.4, OpenBSD 6.3, OpenBSD 6.2, OpenBSD 6.1 shipped it.
Simple Mail Transfer Protocol daemon
Flags it lists
-
-D -
-F -
-P -
-T -
-d -
-f -
-h -
-n -
-v