Consider using Email Connector: https://marketplace.mendix.com/link/component/120739 as Email Template will be deprecated.
The module supports SMTP. Here you can find how to configure AWS SES to support it.
For local testing of the mail, I use a free SMTP server Papercut. https://github.com/ChangemakerStudios/Papercut-SMTP
If you setup Email Connector for Papercut, just fill in user-id and password randomly, the frontend needs it, but Papercut ignores it.
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