I've configured the plugin and created a user and pass for SMTP within AWS. I've obviously installed MyMail Plugin also.
When I attempt to send a test email, it gives me an error: "SMTP Error: Data not accepted. Check your settings"
I've tried it a second time, making sure I'm copy pasting the correct smtp username and pass details into the 'Delivery Method: AmazonSES' section of MyMail plugin but the problem persists.
Please advise what steps I can take to solve this problem?
I've got email from AWS saying I have been granted production access to Amazon SES and I've verified my domain and setup DKIM.