How to solve "Error connecting to SMTP host: [Errno 10061] No connection could be made because the target machine actively refused it''?

I am creating an application where I need to send mail for some particular logs. Here is my rule file:

es_host: localhost
es_port: 9200
name: Log Level Test
type: frequency
index: testindexv4
num_events: 1
timeframe:
   hours: 4
filter:
 - term:
     log_level.keyword: "ERROR"
 - query:
     query_string:
       query: "log_level.keyword: ERROR"
alert:
- "email"
email:
- "<mailId>@gmail.com"

Here is the config.yaml

rules_folder: myrules
run_every:
  seconds: 2
buffer_time:
  seconds: 10
es_host: localhost
es_port: 9200
writeback_index: elastalert_status
alert_time_limit:
  days: 2

Here is smpt_auth.yaml

alert:
 - email
email:
 - "<mailId>@gmail.com"
smtp_host: "smtp.gmail.com" 
smtp_port: 587 
smtp_ssl: true
from_addr: "<mailId>@gmail.com"
smtp_auth_file: 'D:\ELK_Info\ElastAlert\elastalert-master\smtp_auth_user.yaml'

Here is smtp_auth_user.yaml

user: "<mailId>@gmail.com"
password: "<password>"

When I run this command:

python -m elastalert.elastalert --verbose --rule myrules\myrule.yaml

I get an error as:

ERROR:root: Error while running alert email: Error connecting to SMTP host: [Errno 10061] No connection could be made because the target machine actively refused it.

Any idea on how to resolve the same, please?