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-rw-r--r--examples/unsubscribe-milter@.service6
1 files changed, 6 insertions, 0 deletions
diff --git a/examples/unsubscribe-milter@.service b/examples/unsubscribe-milter@.service
index 98e3d478..eb5dcbe4 100644
--- a/examples/unsubscribe-milter@.service
+++ b/examples/unsubscribe-milter@.service
@@ -14,6 +14,12 @@ After = unsubscribe-milter.socket
 # copy+paste errors
 # umask 077 && dd if=/dev/urandom bs=16 count=1 of=.unsubscribe.key
 ExecStart = /usr/local/sbin/unsubscribe.milter /home/mlmmj/.unsubscribe.key
+
+# UNIQUE_MAILTO makes the List-Unsubscribe mailto: header unique
+# so unsubcribing becomes one-step (requires MDA/MTA configuration,
+# see the bottom of examples/unsubscribe.milter
+# Environment = UNIQUE_MAILTO=1
+
 Sockets = unsubscribe-milter.socket
 
 # the corresponding PSGI app needs permissions to modify the