I have enabled Amazon Linux 2 and Amazon SES to ship mail, but SES does not send me an error, especially when I send mail around root.
Duplicate header 'Delivered-To'
I googled and said, “When forwarding, don't add Delivered-To in the header.”
Add the following line to main.cf:
prepend_delivered_header = file
You can now safely transfer without being angry by SES.