send alert message when my alert is resolved,means it does't send recovery message

[iqsing]

zabbix version：2.4.8
alert message is ok, but i will receive a alert message when alert is sloved , i can receive recovery message.
i can't see anything ref from log. i have try to delete and rebuild the config of action or restart zabbix-server but it not work.
what should i do now ? i need you help
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i have enable the recovery message.
this is my configuration of action：

Default subject：
{TRIGGER.STATUS}: {TRIGGER.NAME}
Default message：
Trigger: {TRIGGER.NAME}
Trigger status: {TRIGGER.STATUS}
Trigger severity: {TRIGGER.SEVERITY}
Trigger URL: {TRIGGER.URL}
Item values:
1. {ITEM.NAME1} ({HOST.NAME1}:{ITEM.KEY1}): {ITEM.VALUE1}
2. {ITEM.NAME2} ({HOST.NAME2}:{ITEM.KEY2}): {ITEM.VALUE2}
3. {ITEM.NAME3} ({HOST.NAME3}:{ITEM.KEY3}): {ITEM.VALUE3}

Original event ID: {EVENT.ID}
Recovery message

Recovery subject：
recovery{TRIGGER.STATUS}: {TRIGGER.NAME}
Recovery message：
revocery

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i get the message this：

Subject:
OK: relication delay > 5s on port 13302

Message:
Trigger: relication delay > 5s on port 13302
Trigger status: OK
Trigger severity: High
Trigger URL:

Item values:

1. MySQL replicate delay on port 13302 (mysql-nouse:mysql.multi.replicate_delay[13302]): 3
2. *UNKNOWN* (*UNKNOWN*:*UNKNOWN*): *UNKNOWN*
3. *UNKNOWN* (*UNKNOWN*:*UNKNOWN*): *UNKNOWN*

Original event ID: 304461