Amazon SES will send emails through their own IP addresses and domains. You will need to add DNS records to your main domain (that should be provide by AWS to you) In order to ensure deliverability, avoid phishing reports, and create a reporting path.
The cool thing is that AWS SES gives you an SMTP interface, meaning you should be able to configure this with the instructions Alberto gave you.
We provide an Advanced Email app for Genesys Cloud, so I know the email space very well. Are you unable to send emails through your domain's SMTP because you are using Office 365 and have a daily limit?
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Maksim Gill
Eccentex (Customer Service Platform)
https://www.eccentex.com/genesys------------------------------