diff --git a/ObsoleteFiles.inc b/ObsoleteFiles.inc
index 385e891049e..10f99c5d604 100644
--- a/ObsoleteFiles.inc
+++ b/ObsoleteFiles.inc
@@ -51,6 +51,9 @@
 #   xargs -n1 | sort | uniq -d;
 # done
 
+# 20250726: This file is now installed in /etc/dma
+OLD_FILES+=usr/share/examples/dma/auth.conf
+
 # 20250725: libbsnmp bumped to version 7
 OLD_LIBS+=usr/lib/libbsnmp.so.6
 
diff --git a/libexec/dma/dmagent/Makefile b/libexec/dma/dmagent/Makefile
index 5f7deeea0b0..c8a3bd44a53 100644
--- a/libexec/dma/dmagent/Makefile
+++ b/libexec/dma/dmagent/Makefile
@@ -17,12 +17,14 @@ SRCS=	aliases_parse.y \
 	util.c
 MAN8=	dma.8
 MLINKS=	dma.8 dma.conf.5
-CONFS=	dma.conf
+CONFSMODE=	0640
+CONFSGRP=	mail
+CONFS=	auth.conf dma.conf
 CONFSDIR=	${CONFDIR}/dma
 CFLAGS+=	-DOPENSSL_API_COMPAT=0x10100000L
 YFLAGS+=	-i
 CLEANFILES=	aliases_parse.i
-FILES=	auth.conf mailer.conf
+FILES=	mailer.conf
 FILESDIR=	${SHAREDIR}/examples/dma
 
 BINMODE=	2555
diff --git a/tools/build/mk/OptionalObsoleteFiles.inc b/tools/build/mk/OptionalObsoleteFiles.inc
index 3183c5f0b45..f7eb1e979d0 100644
--- a/tools/build/mk/OptionalObsoleteFiles.inc
+++ b/tools/build/mk/OptionalObsoleteFiles.inc
@@ -1473,12 +1473,12 @@ OLD_DIRS+=usr/share/dict
 .endif
 
 .if ${MK_DMAGENT} == no
+OLD_FILES+=etc/dma/auth.conf
 OLD_FILES+=etc/dma/dma.conf
 OLD_DIRS+=etc/dma
 OLD_FILES+=usr/libexec/dma
 OLD_FILES+=usr/libexec/dma-mbox-create
 OLD_FILES+=usr/share/man/man8/dma.8.gz
-OLD_FILES+=usr/share/examples/dma/auth.conf
 OLD_FILES+=usr/share/examples/dma/mailer.conf
 OLD_DIRS+=usr/share/examples/dma
 .endif