How to fix .. 554 Message rejected: Email address is not verified

Solution 1:

Is this the first time you are using this account with SES? If so then you must be in sandbox mode

If your account is still in the sandbox, you also must verify every recipient email address except for the recipients provided by the Amazon SES mailbox simulator.

SES Doc

You can follow these steps :

1. Log into the AWS Management Console.
2. Go to SES Sending Limits Increase.
3. Fill in the required details and set the limit to your desired usage

Moving Out of Sandbox

Solution 2:

You can only send emails from verified domains to verified domains and email addressed In order to send to others, you must move your account out of sandbox mode by contacting AWS support and requesting it:

https://docs.aws.amazon.com/console/ses/sandbox