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diff --git a/roles/mail/files/sieve/after.d/50-spam.sieve b/roles/mail/files/sieve/after.d/50-spam.sieve
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+#
+# /usr/local/etc/dovecot/sieve/after.d/50-spam.sieve
+#
+# Global filters to filter spams.
+#
+# See: https://wiki.dovecot.org/Pigeonhole/Sieve
+#
+# Aaron LI
+# 2017-04-24
+#
+
+
+# fileinto: place messages into an IMAP folder other than INBOX
+require "fileinto";
+# mailbox: create the IMAP folder if not exists
+require "mailbox";
+# imap4flags: add IMAP flags to stored messages
+require "imap4flags";
+ 
+
+# Just delete spams higher than level 10!
+if header :contains "X-Spam-Level" "**********" {
+    discard;
+    stop;
+}
+ 
+# Move SpamAssassin-tagged mails to "Junk" folder.
+if header :contains "X-Spam-Flag" "YES" {
+    fileinto :create "Junk";
+    setflag "\\Seen";
+    stop;
+}