How to Test SES credentials key is working or not

Hello.

Connect to the SMTP endpoint using the openssl command as described in the documentation below.
Once the connection is established, enter the necessary information and check if you can send emails.
https://docs.aws.amazon.com/ses/latest/dg/send-email-smtp-client-command-line.html#send-email-using-openssl

echo -n “SMTP Username" | openssl enc -base64
echo -n “SMTP Password" | openssl enc -base64
openssl s_client -starttls smtp -crlf -connect email-smtp.us-east-1.amazonaws.com:587

EHLO Domain
AUTH LOGIN
Base64 encoded SMTP username
Base64 encoded SMTP password
MAIL FROM: test@example.com //Sender email address, approved by SES
RCPT TO: sender@example.com //Destination email address
DATA
From: Sender Name //Sender name
To: sender@example.com  //Destination
Subject: Amazon SES SMTP Test

This message was sent using the Amazon SES SMTP interface.
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QUIT