email alert notification not working when member came up again

This is my config:

alert BIGIP_MCPD_MCPDERR_POOL_MEMBER_MON_STATUS_UP "Pool member (.*?) monitor status up."{
    snmptrap OID=".1.3.6.1.4.1.3375.2.4.0.11";
email toaddress="my@email.com"
fromaddress="f5"
body="A pool member went up!"
}
alert BIGIP_MCPD_MCPDERR_NODE_ADDRESS_MON_STATUS "Node (.*?) monitor status down."{
    snmptrap OID=".1.3.6.1.4.1.3375.2.4.0.12";
email toaddress="my@email.com"
fromaddress="f5"
body="Please notice the status of the node!"
}
alert BIGIP_MCPD_MCPDERR_NODE_ADDRESS_MON_STATUS_UP "Node (.*?) monitor status UP."{
    snmptrap OID=".1.3.6.1.4.1.3375.2.4.0.13";
email toaddress="my@email.com"
fromaddress="f5"
body="Please notice the status of the node!"
}
alert BIGIP_MCPD_MCPDERR_POOL_MEMBER_MON_STATUS "Pool member (.*?) monitor status down."{
    snmptrap OID=".1.3.6.1.4.1.3375.2.4.0.10";
email toaddress="my@email.com"
fromaddress="f5"
body="A pool member went down!"
}

How should I adjust it?