doveadm-user(1) on Linux
The text 5ea618c8b11b, as Debian 13 (Trixie) shipped it.
Perform a user lookup in Dovecot's userdbs
Flags it lists
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-D -
-O -
-a -
-c -
-f -
-i -
-k -
-o -
-u -
-v -
-x