vrfy(1) on Linux
The text 78e36f29de7e, as Debian 3.0 (Woody), Debian 2.2 (Potato), Debian 2.1 (Slink) shipped it.
Verify electronic mail addresses
Flags it lists
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-H -
-a -
-d -
-e -
-h -
-l -
-n -
-s -
-v