diff --git a/tools/clear-bouncing-last-7-days.sql b/tools/clear-bouncing-last-7-days.sql
new file mode 100644
index 0000000..c0e5c6f
--- /dev/null
+++ b/tools/clear-bouncing-last-7-days.sql
@@ -0,0 +1,12 @@
+-- Cleaer all bouncing email flags for bounces in the last seven days.
+-- Accounts that have invalid email addresses will be detected again
+-- as soon as one email is sent to that address.
+
+UPDATE User
+SET email_bounce_timestamp = NULL
+WHERE email_bounce_timestamp > UNIX_TIMESTAMP() - 7 * 24 * 60 * 60
+LIMIT 1000;
+
+-- Look at the result, you may want to run it again if 1000 rows were
+-- updated because that means that there were more than that many such
+-- rows to start.