If you are experiencing errors sending email with AWS there may be a couple reasons.
Your Account is in Sandbox Mode.
Your AWS SES account may be in SandBox mode. You can request for it to be taken out of sandbox mode to send email to unvalidated email addresses.
To do this, please follow the official AWS documentation.
Your email address is not validated.
If your email address is not validated then any outgoing email you try and send will fail.
AWS MUST verify ownership of your email before you can send any outgoing email.
You've reached your sending limit.
Production SES accounts typically have a maximum rate of 50,000 emails per day. If you are sending more than that you will need to request a limit increase.