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-rw-r--r--units/mail-transfer-agent.target3
1 files changed, 3 insertions, 0 deletions
diff --git a/units/mail-transfer-agent.target b/units/mail-transfer-agent.target
index 2640076d68..ebb1ea125a 100644
--- a/units/mail-transfer-agent.target
+++ b/units/mail-transfer-agent.target
@@ -7,5 +7,8 @@
# See systemd.special(7) for details
+# This exists mostly for compatibility with SysV/LSB units, and
+# implementations lacking socket/bus activation.
+
[Unit]
Description=Mail Transfer Agent