vacation.sendmail(1) on Linux
The text f26998c048a2, as Debian 7 (Wheezy), Debian 6.0 (Squeeze), Debian 5.0 (Lenny), Debian 4.0 (Etch), Debian 3.1 (Sarge) shipped it.
E-mail auto-responder
Flags it lists
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-I -
-U -
-d -
-i -
-j -
-l -
-x -
-z