Authentication failed 535

We enabled enabled the Amazon aws from the below link.

Once configured with below details we getting the error as Net::SMTPAuthenticationError: 535 Authentication Credentials Invalid.

Configuration details in gitlab.rb

#mail notification configuration
#external_urlhttps://gitlab.syncfusion.com/
gitlab_rails[‘gitlab_email_from’] = “skannan@syncfusion.com
gitlab_rails[‘gitlab_support_email’] = “skannan@syncfusion.com
gitlab_rails[‘smtp_enable’] = true
gitlab_rails[‘smtp_address’] = “email-smtp.us-east-1.amazonaws.com
gitlab_rails[‘smtp_port’] = 587
gitlab_rails[‘smtp_user_name’] = “xxxxxx”
gitlab_rails[‘smtp_password’] = “yyyyyyyy”
gitlab_rails[‘smtp_domain’] = “syncfusion.com
gitlab_rails[‘smtp_authentication’] = “login”
gitlab_rails[‘smtp_enable_starttls_auto’] = true
gitlab_rails[‘smtp_openssl_verify_mode’] = “peer”

The User name and passwords works if I use in JIRA email configuration,

Can you help to resolve this issue?