unable to send the alerts from fusion pipelines using Gmail

Hi Experts,

 
I am very new to GCP, and seeking your expertise, I am trying to send alert after running the pipe line in data fusion I used my official Gmail account to send an alert but after completion there is no email .
When I checked to long there I am getting only Email-1 Error.
 
Host: smtp.gmail.com
Protocol: smtp
Port: 587
User: my Gmail ID
Sender: My Gmail ID
SMTP /POP Forward: Setting is enabled in my Gmail account
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