gmail is blocking my elastic search watcher email - elasticsearch

Question

I am using ES 5.2. I implemented a watcher.But each time watcher is getting triggered it generate email but google blocks that email due to security concern. So what can be solution for that?
My YML file is as below :
cluster.name: elasticsearch-logging
node.name: "elasticsearch-logging-0"
path.data: /var/lib/elasticsearch/data
xpack.notification.email.account:
gmail_account:
profile: gmail
smtp:
auth: true
starttls.enable: true
host: smtp.gmail.com
port: 587
user: ******.**#gmail.com
password: ******
While doing curl on watcher getting below response :
DOING CURL --
curl -XGET localhost:9200/_xpack/watcher/watch/last_watch
Getting below response:
{
"found": true,
"id": "lastwatch",
"status": {
"version": 5,
"state": {
"active": true,
"timestamp": "2017-06-16T00:39:16.654Z"
},
"lastchecked": "2017-06-16T00:43:00.229Z",
"last_met_condition": "2017-06-16T00:43:00.229Z",
"actions": {
"email_admin": {
"ack": {
"timestamp": "2017-06-16T00:39:16.654Z",
"state": "awaits_successful_execution"
},
"last_execution": {
"timestamp": "2017-06-16T00:43:00.229Z",
"successful": false,
"reason": "MessagingException[failed to send email with subject [404 recently encountered] via account [gmail_account]]; nested: AuthenticationFailedException[534-5.7.14 https://accounts.google.com/signin/continue?sarp=1&scc=1&pltn534-5.7.14 q0WEdpll7GFx7wL5ZoIKlaHy0JIWKkJEAaiNf5hWY11ZPPsJb6u7h9z0Xe\n534-5.7.14 kWiT264a1EJgbKW5ESeccxI0uUZ_3X4klQS4jBjB7dDw6pRU490p-yKtXkL2-Ik\n534-5.7.14 vMoQFBgYsmH2WbbGFC3Z63GBpWVH0O9LmpVsB89ZsSreIXN_bb0AX3UWwoX4dTb4UiXtmi\nQI Please log in via your web browser and\n534-5.7.14 then try again.\n534-5.7.14 Learn more at\n534 5.7.14 https://support.google.com/mail/answer/78754 a22sm752699pfc.115 - gsmtp\n]; "
}
}
}
},
"watch": {
"trigger": {
"schedule": {
"cron": "0 0/1 * * * ?"
}
},
"input": {
"search": {
"request": {
"search_type": "query_then_fetch",
"indices": [
"logstash*"
],
"types": [],
"body": {
"query": {
"bool": {
"must": {
"match": {
"methodName": "getSSLConnectionSocketFactory"
}
}
}
}
}
}
}
},
"condition": {
"compare": {
"ctx.payload.hits.total": {
"gt": 0
}
}
},
"actions": {
"email_admin": {
"email": {
"profile": "standard",
"to": [
"****.*****#gmail.com"
],
"subject": "404 recently encountered"
}
}
}
}
}

Answer 1

Looks like a javax.mail issue and you need to turn on less secure apps.